269 free numbers generators
Free Number Generators for Every Use Case
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The number generators handle codes, identifiers, and randomness of every kind — a random number generator, secure password generator, PINs, UUIDs, hashes, and more. Each produces exactly the format you need with control over length and range, so you get usable, copy-ready output rather than something you have to clean up before it fits your system.
The three most popular uses are creating secure, unguessable passwords and PINs, generating unique identifiers and codes like UUIDs and coupon codes in bulk, and picking fair random numbers for draws, samples, and games. Every tool runs entirely in your browser, free and with no login, and nothing you generate is sent to a server. Generate a single value or a whole batch in one click, set the exact length and range your task demands, and copy the result straight into your code, spreadsheet, or game.
This category covers 196 number generators for developers, testers, designers, educators, and anyone who needs random or formatted numeric data fast. Whether you're building a payment form and need Luhn-valid test credit card numbers, setting up two-factor authentication and need a TOTP Secret Key Generator, or running a classroom activity and want a bingo card grid, there's a purpose-built tool here rather than a general-purpose script you have to adapt.
These generators solve the gap between 'I need a number' and 'I need the right kind of number.' A plain random number generator won't produce a structurally valid IBAN, a checksummed EAN-13 barcode, or a UUID with a custom namespace prefix — but dedicated tools like the IBAN Test Number Generator or the Bulk UUID v4 Generator handle the formatting rules so you don't have to. The same applies to passwords: the Memorable Password Generator produces something a human can actually recall, while the Secure Password Generator prioritises entropy for automated systems.
Beyond development and testing, you'll find tools for statistical work (Gaussian distribution generators, number tables in CSV format), game design (dice rollers, noise seed generators, lottery pickers), and security setup (JWT secret keys, TOTP backup codes, API key pairs). Most tools let you configure range, length, format, or quantity, then copy results in one click.
Most popular in this category
All Numbers Generators
Generador de números aleatorios
Genera números aleatorios dentro de un rango personalizado
A random number generator should be instant and bias-free, and this one is. Set a minimum, a maximum, and a count — up to 100 numbers in a single pass — and results appear immediately.
Text•3 inputsClick to open →
Generador de contraseñas
Genera contraseñas seguras y aleatorias con longitud y conjuntos de caracteres personalizados
A password generator removes the weakest link in account security: human predictability. People default to patterns — dictionary words, birth years, keyboard walks — and attackers exploit exactly those habits with rule-based cracking tools.
List•5 inputsClick to open →
Generador de códigos PIN
Genera códigos PIN numéricos aleatorios de cualquier número de dígitos
A PIN code generator removes the human bias that makes self-chosen codes predictable. Most people default to birth years, sequential runs like 1234, or repeated digits like 1111 — patterns attackers try first.
List•3 inputsClick to open →
Generador aleatorio de hashes
Genera cadenas de hash hexadecimales aleatorias de cualquier longitud
A random hash generator produces fixed-length strings of hex or alphanumeric characters that look identical to real cryptographic output — SHA-256, MD5, SHA-1 — without hashing any actual input. Developers reach for this when populating test databases, writing API documentation, or building UI prototypes that need authentic-looking tokens and checksums.
List•3 inputsClick to open →
Generador de códigos OTP
Genera códigos de un solo uso aleatorios para pruebas y prototipos
An OTP code generator is the fastest way to get realistic one-time passcodes for testing auth flows, populating UI mockups, and seeding QA fixtures — without triggering a real SMS gateway or TOTP library. Developers building two-factor authentication screens, designers mocking up verification flows in Figma, and QA engineers writing Cypress login tests all need codes that look real without being real.
List•3 inputsClick to open →
Generador masivo de números aleatorios
Genera varios números aleatorios dentro de un rango personalizado con un solo clic
A bulk random number generator lets you produce dozens of numbers instantly within any range you define. Set your minimum, maximum, count, and whether duplicates are allowed — then get a clean, copyable list in one click.
List•4 inputsClick to open →
Generador de contraseñas seguras
Crea contraseñas seguras y aleatorias con longitud y reglas de caracteres personalizadas
A secure password generator removes the guesswork from creating credentials that hold up against brute-force and credential-stuffing attacks. Set your length (default 16, go higher for vaults), toggle uppercase, numbers, and symbols on or off, and generate up to five passwords in one run — or more if you need a batch.
List•5 inputsClick to open →
Generador de PIN numéricos
Genera PIN numéricos aleatorios de cualquier longitud para dispositivos, cuentas o pruebas
A numeric PIN generator removes the bias from creating access codes you'd otherwise pick yourself. Birthdays, repeating digits, and keyboard patterns dominate real-world PIN choices — and attackers know it.
List•3 inputsClick to open →
Generador aleatorio de códigos hex
Genera códigos hexadecimales aleatorios para colores, tokens, identificadores o semillas criptográficas
A random hex code generator gives developers, designers, and security engineers valid hexadecimal strings on demand. Hex codes appear throughout computing — CSS colors, OAuth secrets, session tokens, memory addresses, and UUID components all rely on base-16 format.
List•4 inputsClick to open →
Generador de números de cuenta bancaria falsos
Genera números de cuenta bancaria y códigos de sucursal falsos con aspecto realista para pruebas
A fake bank account number generator solves a real problem for developers and QA engineers: you need structurally plausible financial data, but using real account numbers in test environments creates compliance and privacy risk. This tool generates fictional account numbers across four formats — UK sort code and account number pairs, US routing and account numbers, EU IBANs, and generic 16-digit numbers.
List•2 inputsClick to open →
Generador masivo de UUID v4
Genera varios identificadores UUIDv4 a la vez con formato opcional
The bulk UUID v4 generator creates up to 100 RFC 4122-compliant identifiers in a single click — no setup, no server calls. UUID v4s are built entirely from random bits, meaning no timestamps or MAC addresses are embedded, and no coordination between nodes is needed.
List•3 inputsClick to open →
Generador de contraseñas robustas
Genera contraseñas aleatorias robustas y personalizables con control de símbolos y longitud
A strong password generator saves you from the weak, reused credentials that make accounts easy targets for brute-force and credential-stuffing attacks. This tool builds cryptographically random passwords locally in your browser — nothing is sent to a server, ever.
List•5 inputsClick to open →
Generador aleatorio de PIN
Genera PIN numéricos aleatorios de cualquier longitud, incluidos formatos agrupados
A random PIN generator removes the guesswork — and the bias — from creating secure numeric codes. People default to birthdates, repeating digits, and sequential patterns; attackers know this and target those choices first.
List•3 inputsClick to open →
Generador de claves de API
Genera claves de API aleatorias en formatos comunes, como hex, alfanumérico y con prefijo
An API key generator built for developers who need correctly formatted authentication tokens without writing a script or spinning up a server. This tool produces keys in four real-world formats: 64-character hex strings, 32-character alphanumeric tokens, Stripe-style prefixed keys like `sk_live_...`, and segmented keys for human-readable distribution.
List•3 inputsClick to open →
Generador de secuencias de números aleatorios
Genera una secuencia aleatoria de números únicos dentro de un rango definido, sin repeticiones
A random number sequence generator pulls a set of unique numbers from any range you define — no repeats, ever. It works like drawing numbered balls from a bag without replacement: once a number is picked, it's gone.
List•4 inputsClick to open →
Generador de contraseñas memorables
Genera contraseñas formadas por palabras y números aleatorios fáciles de recordar pero difíciles de descifrar
A memorable password generator builds passphrases from random words and numbers — easy to recall, hard to crack. Traditional passwords like `xK7#mQ2!` are nearly impossible to memorize, which pushes most people toward reusing weak ones.
List•3 inputsClick to open →
Generador de números aleatorios en un rango
Genera números enteros o decimales aleatorios dentro de un rango mínimo/máximo personalizado
A random number in range generator lets you produce integers or decimals between any two values you define — no code required. Set your minimum and maximum, pick a count up to whatever your range supports, choose decimal precision from 0 to 8 places, and hit Generate.
List•5 inputsClick to open →
Generador de hash SHA-256
Genera una cadena de hash SHA-256 a partir de cualquier texto usando JavaScript puro
A SHA-256 hash generator converts any text into a fixed 64-character hexadecimal fingerprint using the browser's built-in Web Crypto API — your input never leaves your device. SHA-256 is the backbone of modern security: it validates software checksums, powers HMAC request signing, and underpins Bitcoin's transaction model.
Text•2 inputsClick to open →
Generador de números de tarjeta de crédito falsos
Genera números de tarjeta de crédito falsos con formato válido para pruebas usando el algoritmo de Luhn
A fake credit card number generator creates structurally valid card numbers that pass the Luhn algorithm — the checksum every major payment network uses to verify digit integrity. Developers building checkout forms, QA engineers stress-testing billing flows, and frontend designers mocking up payment UIs all need realistic card data that won't touch real financial accounts.
List•3 inputsClick to open →
Generador de tiradas de dados
Lanza uno o varios dados de cualquier tipo estándar y muestra los resultados con un total
A dice roller generator gives you instant, fair rolls for any standard polyhedral die without hunting for physical dice or loading a dedicated app. Set the number of dice, pick a type from D4 through D100, and apply a positive or negative modifier to match your game system exactly.
Text•3 inputsClick to open →
Generador de código binario
Convierte o genera cadenas de números binarios aleatorias de cualquier longitud
A binary code generator is the fastest way to produce random binary number strings without manual calculation or scripted loops. Set the bit width — 8 bits for byte-level work, 32 bits for integer overflow demos — and choose how many strings you need.
List•2 inputsClick to open →
Generador de claves secretas TOTP
Genera claves secretas aleatorias codificadas en Base32 para apps de autenticación de dos factores TOTP
A TOTP secret key generator produces the Base32-encoded shared seed that connects your server to an authenticator app like Google Authenticator, Authy, or Microsoft Authenticator. When a user scans a QR code during 2FA enrollment, this string is what gets transferred — both sides then derive the same six-digit code every 30 seconds without any network call.
List•2 inputsClick to open →
Generador de direcciones MAC
Genera direcciones MAC aleatorias en los formatos estándar separados por dos puntos o guiones
A MAC address generator lets you instantly produce random, correctly formatted 48-bit hardware identifiers without writing a single line of code. Each address follows the standard six-octet hexadecimal structure used by Ethernet, Wi-Fi, and Bluetooth interfaces.
List•3 inputsClick to open →
Generador de números de serie
Genera números de serie alfanuméricos aleatorios en formatos personalizables
A serial number generator gives you structured alphanumeric identifiers on demand, without typing them out by hand. Define your format using three placeholders — X for a letter, N for a digit, and * for either — then embed any literal characters like hyphens or dots directly in the pattern.
List•3 inputsClick to open →
Generador de números de lotería
Genera combinaciones de números de lotería aleatorias con rango y número de bolas configurables
A lottery number generator removes personal bias from ticket selection by producing truly random picks across any number range you specify. Most players unconsciously cluster their choices below 32 — birthdays, anniversaries, lucky dates — leaving the upper half of the draw pool untouched.
List•5 inputsClick to open →
Generador de ULID
Genera identificadores únicos universales ordenables lexicográficamente (ULID)
A ULID generator solves a frustrating gap in standard UUID v4: those identifiers are purely random and cannot be sorted by creation time. ULIDs encode a 48-bit millisecond timestamp in the first 10 characters, followed by 80 bits of cryptographic randomness — giving you a 26-character ID that sorts chronologically out of the box.
List•1 inputClick to open →
Generador de tokens hex aleatorios
Genera tokens hexadecimales aleatorios de cualquier longitud con estilo criptográfico
A random hex token generator creates fixed-length strings of hexadecimal characters used as unguessable identifiers in web apps, APIs, and auth flows. Password reset links, session IDs, webhook secrets, and API keys all rely on this pattern.
List•3 inputsClick to open →
Generador de cadenas Base64 aleatorias
Genera cadenas codificadas en Base64 aleatorias para secretos, tokens y pruebas de codificación
A random Base64 string generator produces cryptographically random bytes and encodes them into compact, printable strings suited for application secrets, signing keys, and tokens. Base64 output embeds safely in JSON configs, `.env` files, and HTTP headers without special handling.
List•3 inputsClick to open →
Generador de listas de números aleatorios
Genera una lista de números aleatorios únicos o repetidos dentro de un rango personalizado
A random number list generator sounds simple, but the details matter. This one lets you set any min/max range, control exactly how many numbers you get, toggle duplicate values on or off, and sort results ascending or descending before you copy them out.
List•5 inputsClick to open →
Generador de códigos con formato personalizado
Genera códigos aleatorios en cualquier patrón personalizado usando # para dígitos y A para letras
The custom format code generator lets you build random codes in any pattern you define — paste in a structure like AAA-#### or PROMO-****-**** and get a clean batch in seconds. Type # for a digit, A for a letter, or * for either; everything else passes through as a literal, so dashes, dots, and fixed prefixes stay exactly where you put them.
List•3 inputsClick to open →
Generador de códigos alfanuméricos
Genera códigos alfanuméricos aleatorios para vales, códigos de invitación e identificadores de referencia
An alphanumeric code generator is the fastest way to produce random strings of letters and numbers for vouchers, invite codes, reference IDs, and any short unique identifier. Set the count, choose a length between 8 and 16 characters, and toggle uppercase-only output — uppercase removes the classic transcription errors between lowercase 'l', '1', uppercase 'O', and zero that frustrate users every day.
List•3 inputsClick to open →
Generador de códigos aleatorios de 3 dígitos
Genera códigos de seguridad numéricos aleatorios de 3 o 4 dígitos para pruebas y prototipos
A random 3-digit code generator gives developers, QA engineers, and designers an instant supply of numeric security codes for testing and prototyping. No spreadsheets, no manual typing.
List•2 inputsClick to open →
Generador de IDs de token seguros
Genera IDs de token aleatorios de estilo criptográfico para autenticación y gestión de sesiones
A secure token ID generator creates the random strings used as session IDs, password reset links, API secrets, and webhook signatures. Any application that grants access without a stored password depends on tokens with enough randomness to resist brute-force attacks.
List•3 inputsClick to open →
Generador de códigos de matrícula aleatorios
Genera códigos de matrícula simulados aleatorios de estilo británico o estadounidense para diseño y pruebas
A random number plate code generator creates realistic but entirely fictitious vehicle registration strings for design, development, and data work. Choose UK format (AA00 AAA — the post-2001 DVLA structure) or US-style alphanumeric combinations, set how many you need, and get a clean list instantly.
List•2 inputsClick to open →
Generador de números IBAN de prueba aleatorios
Genera números IBAN aleatorios estructuralmente válidos para probar aplicaciones bancarias y financieras
A random IBAN test number generator creates structurally valid International Bank Account Numbers for GB, DE, FR, NL, and ES — letting developers and QA engineers test payment flows without touching real account data. Each IBAN follows the correct country prefix, check digits, and fixed character length for its format, so validation logic and payment APIs respond exactly as they would with genuine input.
List•2 inputsClick to open →
Generador de tokens de cadena aleatorios
Genera tokens alfanuméricos aleatorios seguros para autenticación y uso de API
A random string token generator is an essential tool for developers building authentication systems, API integrations, and session management workflows. Set your token length, pick a character set — alphanumeric, hex, uppercase, or numeric — and generate a batch of tokens instantly, no backend required.
List•3 inputsClick to open →
Generador de contraseñas con reglas personalizadas
Genera contraseñas basadas en reglas de caracteres y requisitos de complejidad específicos
A custom rule password generator lets you define exact character requirements before generating — so every output complies with your target system on the first try. Toggle uppercase letters, digits, and symbols on or off, set the length (default 16), and choose how many passwords to produce in one batch.
List•5 inputsClick to open →
Generador de identificadores cortos estilo NanoID
Genera identificadores únicos compactos y seguros para URL, más cortos que los UUID
A NanoID-style short ID generator produces compact, URL-safe unique identifiers that fit cleanly into URLs, API responses, and log files without the bulk of a standard UUID. At 21 characters, a NanoID matches UUID v4's collision resistance while being 36% shorter — a real difference when IDs appear thousands of times in network payloads or database rows.
List•3 inputsClick to open →
Generador por lotes de OTP y códigos de verificación
Genera lotes de códigos de verificación de un solo uso numéricos o alfanuméricos
A batch OTP generator is the fastest way to produce dozens or hundreds of one-time verification codes without writing a script. QA engineers use it to seed staging databases, developers use it to test 2FA flows, and marketing teams use it to pre-generate single-use promo codes before a launch.
List•4 inputsClick to open →
Generador de números aleatorios con dígito de control
Genera números aleatorios con un dígito de control basado en Luhn o en la suma
A random number with checksum generator produces structurally valid identifiers by appending a mathematically derived check digit to each number. This tool supports the Luhn algorithm — the standard behind credit card, IMEI, and national ID validation — plus a sum-based algorithm used in formats like ISBN-10.
List•4 inputsClick to open →
Generador de IDs estilo CUID
Genera IDs únicos resistentes a colisiones en formato CUID para bases de datos y APIs
A CUID-style ID generator creates collision-resistant unique identifiers designed for databases, distributed systems, and APIs. Unlike UUIDv4, CUID-format IDs embed a timestamp at the front, so records sort in rough creation order without extra indexing work.
List•2 inputsClick to open →
Generador de Bytes Aleatorios en Hex
Genera cadenas de bytes aleatorios de estilo criptográfico en formato hexadecimal
A random bytes hex generator lets you produce hex-encoded byte strings for tokens, keys, salts, and nonces without writing any code. Each output mirrors what you'd get from Node.js crypto.randomBytes() or Python's os.urandom() — two hex characters per byte, so 16 bytes gives you a 32-character string carrying 128 bits of entropy.
List•3 inputsClick to open →
Generador de Números ISBN de Prueba
Genera números de prueba ISBN-10 e ISBN-13 con formato válido para desarrollo y pruebas
An ISBN test number generator saves developers from manually calculating check digits or cannibalizing real book records just to populate a test environment. It produces structurally correct ISBN-10 and ISBN-13 numbers that pass format validation but aren't registered to any published title — safe to bulk-insert into staging databases or share in demos without triggering unintended API calls to real catalogues.
List•3 inputsClick to open →
Generador de frases de contraseña
Genera frases de contraseña memorables de varias palabras, fuertes pero fáciles de recordar
A passphrase generator builds strong passwords from random words instead of random characters — making credentials that are both secure and genuinely memorizable. A four-word phrase like 'Copper-Lantern-Frost-Bridge' carries more entropy than most 8-character passwords and is far easier to recall.
List•4 inputsClick to open →
Generador de códigos cortos
Genera códigos alfanuméricos cortos para vales, códigos de referido y enlaces de invitación
A short code generator is the quickest way to produce clean, typeable alphanumeric codes for vouchers, referral programs, ticket systems, and invite links. This tool deliberately strips look-alike characters — O/0, I/1 — so recipients can enter codes accurately without squinting at a screen.
List•4 inputsClick to open →
Generador de números aleatorios en código Morse
Genera números aleatorios y los muestra en código Morse
A random Morse code number generator solves a surprisingly common problem: you need encoded numeric sequences fast, and hand-translating digits is slow and error-prone. Set the count, minimum, and maximum values, and the tool returns each number paired with its dot-and-dash representation — no lookup table required.
List•3 inputsClick to open →
Generador de números romanos aleatorios
Genera números aleatorios y los convierte en números romanos
A random Roman numeral generator solves a simple but tedious problem: converting a batch of numbers by hand is error-prone and slow. This tool picks random integers within your chosen min/max range and outputs each one paired with its Roman numeral equivalent — both forms together, ready to copy.
List•3 inputsClick to open →
Generador de códigos de cupón
Genera códigos de cupón y descuento alfanuméricos aleatorios para promociones
A coupon code generator is the fastest way to produce batches of unique, random discount codes for e-commerce promotions, email campaigns, or loyalty programs. Typing codes by hand risks duplicates and predictable patterns — this tool avoids both.
List•3 inputsClick to open →
Generador de números de código de barras aleatorios
Genera números de código de barras estilo EAN-13 y UPC-A aleatorios con dígitos de control válidos
A random barcode number generator saves hours when you need realistic test data for retail or inventory systems. This tool produces EAN-13 and UPC-A numbers with mathematically correct check digits, calculated using the standard weighted-sum algorithm — so they pass format validation in any library or POS system without being registered to a real product.
List•2 inputsClick to open →
Generador de GUID
Genera GUIDs aleatorios en múltiples formatos, incluidos mayúsculas, minúsculas y con llaves
A GUID generator gives you instant access to one or more Globally Unique Identifiers — Microsoft's 128-bit UUID implementation used to uniquely identify objects across systems without central coordination. The format you pick has real consequences: braced GUIDs for .NET's Guid.Parse(), hyphenless strings for compact NoSQL document IDs, uppercase for legacy COM interfaces.
List•2 inputsClick to open →
Generador aleatorio de números primos
Genera números primos aleatorios dentro de un rango elegido
A random prime number generator gives you verified prime values instantly, without manually running divisibility checks or scanning lookup tables. Set how many primes you need, define a minimum value, and cap the upper bound — the tool returns a tailored list drawn from all primes inside that range.
List•3 inputsClick to open →
Generador de Números de Puerto Aleatorios
Genera números de puerto de red aleatorios de los rangos de sistema, registrados o dinámicos
A random port number generator is a practical shortcut for developers and DevOps engineers who need valid, non-conflicting port numbers fast. Port numbers fall into three IANA-defined ranges: well-known (0–1023) for system services, registered (1024–49151) for applications, and dynamic (49152–65535) for ephemeral OS connections.
List•3 inputsClick to open →
Generador de contraseñas por lotes
Genera varias contraseñas únicas a la vez con longitud y conjuntos de caracteres configurables
A batch password generator solves the tedious, error-prone task of creating dozens of secure credentials by hand. Security engineers, sysadmins, and QA teams use it to provision employee accounts, seed test databases, or verify that an auth system handles different character sets correctly.
List•3 inputsClick to open →
Generador estilo UUID v1
Genera identificadores estilo UUID v1 basados en tiempo con componentes de marca de tiempo
A UUID v1-style generator creates time-based identifiers that embed a high-resolution timestamp alongside random node and clock sequence bytes. That timestamp fingerprint means a batch of IDs sorts chronologically — useful when you need to reconstruct event order in distributed systems, audit logs, or append-only tables without storing a separate created_at column.
List•1 inputClick to open →
Generador de números de código de barras EAN-13
Genera números de código de barras EAN-13 válidos con los dígitos de control correctos
An EAN-13 barcode number generator solves a specific, recurring problem: you need structurally valid 13-digit barcodes for dev and test work, but hardcoding real product codes creates collisions and legal grey areas. Every number produced here includes a correctly computed check digit, so it passes validation in any compliant scanner, POS system, or inventory API without touching a live GS1 registry.
List•2 inputsClick to open →
Generador de Números de Teléfono Aleatorios
Genera números de teléfono aleatorios realistas para múltiples países y formatos
A random phone number generator is a practical time-saver for developers, QA engineers, and designers who need realistic phone data without touching real user records. Testing a contact form, seeding a staging database, or building a Figma prototype all demand numbers that look legitimate.
List•2 inputsClick to open →
Generador de direcciones Bitcoin aleatorias
Genera direcciones de monedero estilo Bitcoin aleatorias para pruebas y uso educativo
A random Bitcoin address generator gives developers, designers, and educators a safe way to produce realistic wallet address strings without touching a live network. When building a crypto payment interface, hardcoding the same address creates blind spots in validation logic and makes UI mockups look fake.
List•2 inputsClick to open →
Generador de Números al Estilo SSN Aleatorios
Genera números ficticios al estilo SSN con formato para pruebas y desarrollo en EE. UU.
A random SSN-style number generator gives developers and QA engineers realistic, fictional Social Security Number-formatted identifiers with zero PII risk. Every number produced uses a 900–999 area prefix — a range permanently reserved by the SSA and never assigned to real people — so outputs are definitionally safe for any testing context.
List•2 inputsClick to open →
Generador de Semillas de Ruido Aleatorias
Genera semillas aleatorias para ruido procedimental, juegos y generación de mundos
A random noise seed generator gives you the starting values that drive procedural generation in games, simulations, and generative art. Every seed feeds a pseudo-random number generator (PRNG); because PRNGs are deterministic, the same seed always reproduces the same terrain, dungeon, or noise pattern.
List•2 inputsClick to open →
Generador de Números de Tarjeta de Crédito de Prueba
Genera números de tarjeta de crédito de prueba válidos según Luhn para desarrollo de sistemas de pago
A test credit card number generator saves developers from hardcoding the same handful of Stripe test cards into every project. This tool produces Luhn-valid numbers for Visa, Mastercard, American Express, and Discover — each with the correct prefix and digit length for its network.
List•2 inputsClick to open →
Generador de códigos de paleta de color aleatorios
Genera conjuntos coordinados de códigos de color hex como paletas armoniosas
A random color palette code generator removes the blank-canvas problem by producing coordinated hex code sets that actually work together visually. Designers, developers, and brand consultants use it to explore color directions in seconds rather than spinning a color wheel by hand.
Grid•2 inputsClick to open →
Generador de Números de Seguimiento de Prueba
Genera formatos realistas de números de seguimiento de paquetes y envíos para pruebas
A tracking number style generator solves a real frustration in e-commerce and logistics development: you need realistic-looking tracking numbers to test your systems, but using real ones risks exposing customer data or hitting live carrier APIs. This tool generates fictional numbers styled after UPS, FedEx, USPS, and DHL formats — giving your test data the right shape without real-world side effects.
List•2 inputsClick to open →
Generador de fracciones aleatorias
Genera fracciones aleatorias con rangos de numerador y denominador personalizables
A random fraction generator gives maths teachers, students, and developers a reliable supply of proper fractions without writing them by hand. Set your maximum denominator, choose a count, and toggle simplification on or off — the tool returns a ready-to-use list in seconds.
List•3 inputsClick to open →
Generador de marcas de tiempo Unix aleatorias
Genera marcas de tiempo Unix aleatorias dentro de un rango de fechas configurable
A random Unix timestamp generator saves developers from manually calculating epoch offsets when they need realistic date values spread across a meaningful time window. Unix timestamps — integers counting seconds or milliseconds since January 1, 1970 — are the default date format in virtually every database, operating system, and API on the planet.
List•4 inputsClick to open →
Generador de números aleatorios ponderados
Genera números aleatorios en los que ciertos valores aparecen con más frecuencia según unos pesos
A weighted random number generator lets you shape probability distributions so certain number ranges appear more often than others — essential when pure randomness doesn't reflect real-world conditions. You control three bands across your chosen maximum: low (1–33%), mid (34–66%), and high (67–100%), each assigned a percentage weight that must total 100.
List•4 inputsClick to open →
Generador de cuadrículas de números aleatorios
Genera una cuadrícula de números aleatorios para cartones de bingo, sopas de números y actividades de aula
A random number grid generator is the fastest way to produce a filled matrix of numbers in any size and range you need. Set your rows and columns, define a min and max value, and choose whether numbers repeat or stay unique — the grid is ready in one click.
Grid•5 inputsClick to open →
Generador de números pares o impares aleatorios
Genera números aleatorios filtrados a solo valores pares o solo impares dentro de un rango
A random even or odd number generator saves you from the tedious step of filtering out unwanted values after the fact. Set your minimum, maximum, and count, pick Even, Odd, or Mixed, and every number in the output already matches your chosen parity.
List•4 inputsClick to open →
Generador de códigos de invitación
Genera códigos de invitación y referido cortos y legibles para apps y promociones
An invite code generator creates short, human-readable referral and invitation codes for apps, SaaS platforms, beta programmes, and promotions. Unlike raw UUIDs, these codes are designed for manual entry — ambiguous characters like 0, O, 1, and I are excluded so users can type them accurately from a screenshot or printed card.
List•4 inputsClick to open →
Generador de números aleatorios en palabras
Genera números aleatorios y los escribe en palabras en inglés
A random number in words generator sounds simple, but finding one that handles British English phrasing correctly is surprisingly rare. This tool picks random integers up to your chosen maximum and spells each one out — 'four hundred and twelve', not 'four hundred twelve'.
List•3 inputsClick to open →
Generador de porcentajes aleatorios
Genera valores de porcentaje aleatorios con decimales y rango configurables
A random percentage generator is the fastest way to produce a batch of realistic numeric values when you need mock data without the bias of typing numbers yourself. Set your minimum and maximum bounds, choose how many values to generate, dial in decimal places, and toggle the % symbol on or off depending on where the output is going.
List•5 inputsClick to open →
Generador de coordenadas GPS aleatorias
Genera pares de coordenadas de latitud y longitud aleatorias para pruebas y mapas
A random GPS coordinate generator gives you valid latitude and longitude pairs instantly, without hand-crafting test data or scraping real addresses. Developers use it to seed spatial databases, mock geolocation APIs, and stress-test map components before production data exists.
List•4 inputsClick to open →
Generador de Tokens Aleatorios Seguros
Genera tokens aleatorios de estilo criptográfico en formato hex, base62 o numérico
A secure random token generator is the fastest way to produce high-entropy strings for API keys, session identifiers, invite links, and test fixtures. Pick from five character sets — lowercase hex, uppercase hex, base36, base62, or numeric — set the exact length your system expects, and generate up to several tokens at once.
List•4 inputsClick to open →
Generador estilo UUID v7
Genera identificadores estilo UUID v7 ordenados por tiempo con prefijo de marca de tiempo en milisegundos
A UUID v7-style generator creates time-ordered identifiers with a 48-bit millisecond timestamp in the most-significant bits, followed by 62 bits of random data — making each ID globally unique and chronologically sortable. Unlike UUID v4, which scatters records randomly across a B-tree index, v7-style IDs always insert near the tail, keeping write performance close to auto-increment without sacrificing global uniqueness.
List•1 inputClick to open →
Generador de números gaussianos aleatorios
Genera números aleatorios con distribución normal (curva de campana) con media y desviación estándar personalizadas
A random Gaussian number generator produces values that follow a normal (bell curve) distribution, where results cluster around a central mean rather than spreading uniformly across a range. That makes it the right tool for simulating exam scores, sensor noise, financial returns, or any real-world measurement where most values land near the middle.
List•4 inputsClick to open →
Generador de Códigos sin Ambigüedad
Genera códigos legibles que evitan caracteres confundibles como 0/O, 1/l/I
An ambiguous-free code generator creates codes that strip visually confusable characters — 0/O, 1/l/I, 5/S, 8/B — before they reach a real person. The result is a string anyone can read off a receipt or ticket and type correctly on the first try.
List•3 inputsClick to open →
Generador de conjuntos de números aleatorios
Genera un conjunto de números aleatorios únicos y sin repetir dentro de un rango
A random number set generator picks a specified count of unique numbers from a range you define — no duplicates, ever. Think of it like drawing numbered balls from a lottery drum: once a number is drawn, it's gone.
List•4 inputsClick to open →
Generador de códigos de respaldo TOTP
Genera códigos de recuperación de un solo uso para configuraciones de autenticación de dos factores
A TOTP backup code generator lets you create one-time recovery codes that mirror what services like GitHub, Google, and Dropbox hand users during 2FA setup. Developers building custom authentication flows need realistic codes to prototype onboarding screens, test input validation, and seed staging databases before any real cryptography is involved.
List•2 inputsClick to open →
Generador de IDs cortos ordenables
Genera IDs alfanuméricos cortos que se ordenan cronológicamente sin ser UUID completos
A sortable short ID generator creates compact, alphanumeric identifiers with a base-36 timestamp baked into the front, so a plain alphabetical sort always returns records in creation order. No separate created_at column needed.
List•3 inputsClick to open →
Generador de números aleatorios en varias bases
Genera un número aleatorio y lo muestra simultáneamente en binario, octal, decimal y hexadecimal
A random number in multiple bases generator gives you instant cross-referencing across binary, octal, decimal, and hexadecimal — the four number systems that appear most in low-level programming and computer science. Instead of converting values by hand or juggling separate tools, you see every representation of the same integer side by side the moment you click generate.
List•3 inputsClick to open →
Generador de Patrones de PIN Memorables
Genera PINs usando patrones memorables como dígitos repetidos, ascendentes o recorridos de teclado
A memorable PIN pattern generator helps security trainers, developers, and QA engineers produce realistic PIN data fast. Real users don't pick random digits — they choose 1234, repeat numbers, or trace keyboard walks — and this tool replicates exactly that behavior.
List•3 inputsClick to open →
Generador de cartones de bingo de números aleatorios
Genera cuadrículas de cartones de bingo imprimibles con números aleatorios únicos en el clásico formato 5x5
A random number bingo card generator saves you from hand-writing grids or wrestling with spreadsheet formulas before game night. Each card is a 5×5 layout with 24 unique numbers and a free centre square — the standard 75-ball format.
List•2 inputsClick to open →
Generador de Contraseñas con Puntuación de Entropía
Genera contraseñas y calcula su puntuación de entropía en bits para mostrar lo fuertes que son realmente
A password with entropy score generator gives you something most password tools skip: the actual math behind password strength. Entropy, measured in bits using log2(N^L), tells you exactly how many guesses a brute-force attack needs — not a vague color label.
List•3 inputsClick to open →
Generador de Frases de Contraseña Aleatorias
Genera frases de contraseña seguras y memorables a partir de combinaciones de palabras aleatorias con números y símbolos opcionales
A random passphrase generator builds strong, memorable passwords by stringing together unrelated words separated by a character of your choice. Unlike a jumbled string of letters and symbols, a passphrase like "cobalt-jungle-mirror-freight" is long enough to resist brute-force attacks while staying easy to recall.
List•3 inputsClick to open →
Generador de Lotes de Números Aleatorios
Genera un lote de números aleatorios únicos dentro de un rango personalizado
A random number batch generator lets you produce dozens of integers at once — set your min, max, and count, then decide whether duplicates are allowed. No scripting, no spreadsheet formulas required.
List•4 inputsClick to open →
Generador de Contraseñas Pronunciables
Genera contraseñas aleatorias fáciles de leer en voz alta y recordar
A pronounceable password generator builds credentials by alternating consonants and vowels, producing strings that sound like invented words rather than character soup. The result is a password you can read aloud to a colleague, dictate over the phone, or type correctly on the first try — no spelling required.
List•3 inputsClick to open →
Generador de códigos de color hex aleatorios
Genera códigos de color hex aleatorios para uso en diseño y desarrollo
A random hex color code generator saves you from manually inventing color values when you need a quick batch for prototyping, testing, or creative exploration. Each code is a six-character hexadecimal string encoding red, green, and blue channels — 256 levels each — giving a total palette of over 16 million possible colors.
List•3 inputsClick to open →
Generador de cuadrículas de PIN y tokens
Genera una cuadrícula visual de PIN o tokens cortos aleatorios para uso por lotes
The PIN & token grid generator creates a scannable batch of random codes — numeric PINs or alphanumeric tokens — laid out in a clean card grid you can copy, assign, or print immediately. Set the code length (default 6), choose your character set, and specify how many codes you need.
Grid•3 inputsClick to open →
Generador de direcciones IPv4 aleatorias
Genera direcciones IPv4 aleatorias para pruebas, redes y desarrollo
A random IPv4 address generator saves developers, network engineers, and security researchers from inventing plausible-looking addresses by hand. IPv4 follows strict dotted-decimal notation — four octets, 0 to 255 — and this tool produces addresses that conform to that standard.
List•2 inputsClick to open →
Generador de Sort Codes del Reino Unido Aleatorios
Genera sort codes bancarios con formato del Reino Unido aleatorios para pruebas y desarrollo
A random UK sort code generator is exactly what fintech developers and QA engineers need when building payment forms, seeding test databases, or mocking open banking APIs without touching real customer data. Sort codes are six-digit identifiers, written as three hyphen-separated pairs like 20-00-00, that route domestic UK payments through BACS, Faster Payments, and CHAPS.
List•3 inputsClick to open →
Generador de combinaciones de números aleatorias
Genera combinaciones o permutaciones únicas de números de un rango elegido
A random number combination generator picks a set of unique numbers from a defined range — useful for lottery simulations, raffle draws, probability exercises, and game design. Set your pick count and pool size: classic setups include 6 from 49 for UK Lotto or 5 from 50 for EuroMillions main numbers.
List•4 inputsClick to open →
Generador de códigos de activación de software
Genera códigos aleatorios de activación y claves de licencia estilo software
A software activation code generator lets you produce realistic, grouped license keys in seconds — no scripts, no spreadsheets. The classic hyphen-separated format (think Windows or Steam product keys) is instantly recognizable, and this tool replicates it while giving you full control over group count, characters per group, batch size, and an optional prefix.
List•4 inputsClick to open →
Generador de Números Semilla Aleatorios
Genera números semilla aleatorios para juegos, generación procedimental y simulaciones
A random seed number generator creates the starting values that drive pseudo-random number generators in games, simulations, and scientific code. Because any given seed always produces the same sequence of outputs, seeds are the key to making randomised systems reproducible — share the number, share the result.
List•3 inputsClick to open →
Generador de números decimales aleatorios
Genera números de coma flotante aleatorios entre dos valores cualesquiera con decimales configurables
A random float generator produces decimal numbers within a defined range, giving you full control over the minimum value, maximum value, and number of decimal places in each result. Floating-point numbers are fundamental wherever precision matters more than whole numbers — probabilities, measurements, coordinates, prices, and sensor readings all live in decimal space.
List•4 inputsClick to open →
Generador de Combo Contraseña + PIN
Genera una contraseña segura emparejada con un PIN memorable en un clic
A password + PIN combo generator solves a specific, recurring problem: you need a strong alphanumeric password and a numeric PIN at the same moment, and running two separate generators wastes time. This tool produces matched pairs in one click.
List•3 inputsClick to open →
Generador de tablas de números aleatorios
Genera una tabla en cuadrícula de números aleatorios para estadística, educación y muestreo
A random number table generator builds a custom grid of integers you can print, paste, or distribute — no spreadsheet or statistical software needed. Statistics teachers, researchers, and fieldworkers have relied on number tables for decades to demonstrate unbiased sampling in a way that's visible and hands-on.
Text•4 inputsClick to open →
Generador de códigos únicos
Genera códigos alfanuméricos únicos en formatos personalizados para entradas, vales e IDs
A unique code generator saves hours of manual work when you need formatted alphanumeric codes for tickets, vouchers, serial numbers, or promo campaigns. Define your pattern using three placeholders — X for a letter, 0 for a digit, # for either — and any separator characters you type are preserved exactly.
List•3 inputsClick to open →
Número aleatorio entre X e Y
Genera rápidamente uno o varios números enteros aleatorios entre dos valores cualesquiera
A random number between X and Y generator sounds simple, but the details matter. Set your own minimum and maximum — any integers, including negatives — choose how many numbers to draw, and toggle the no-duplicates option to ensure every result is distinct.
List•4 inputsClick to open →
Generador de claves secretas JWT
Genera claves secretas aleatorias criptográficamente fuertes para firmar JSON Web Tokens
A JWT secret key generator saves you from one of the most common authentication mistakes: weak or reused signing secrets. HMAC-based JWT algorithms like HS256, HS384, and HS512 are only as secure as the entropy behind their key.
List•3 inputsClick to open →
Generador de Listas de Números
Genera una lista de números secuencial o barajada con valores personalizados de inicio, fin y paso
A number list generator lets you produce any arithmetic sequence in seconds — sequential, stepped, or shuffled — without writing formulas or dragging cells. Set a start value, an end value, and a step size to get odd numbers, multiples of 5, axis tick intervals, or any evenly spaced range instantly.
List•4 inputsClick to open →
Generador de IDs aleatorios
Genera IDs numéricos, alfanuméricos o con prefijo aleatorios para bases de datos y registros
A random ID generator is an essential tool for developers, testers, and system architects who need unique identifiers without spinning up a database or writing custom scripts. This generator produces numeric IDs (e.g.
List•4 inputsClick to open →
Generador de patrones numéricos
Genera patrones y secuencias numéricas visuales para educación matemática y puzzles
A number pattern generator for teachers, students, and developers who need accurate sequences without manual calculation. Choose from Fibonacci, square numbers, triangular numbers, primes, powers of 2, or multiples of any integer — then set how many terms you want, up to the generator's limit.
Text•3 inputsClick to open →
Generador de Códigos Aleatorios de 6 Dígitos
Genera códigos numéricos aleatorios de 6 dígitos para verificación, pruebas y uso de un solo uso
A random 6-digit code generator solves a surprisingly common problem: getting realistic numeric codes into test suites, prototypes, and seed scripts without writing throwaway code. OTP flows, 2FA mocks, PIN simulations, and pre-printed access forms all need numeric strings that behave like real codes.
List•4 inputsClick to open →
Generador de Lotes de Colores Hex Aleatorios
Genera múltiples códigos de color hex aleatorios a la vez para diseño y desarrollo
A random hex color batch generator saves real time when you need a spread of valid color codes fast. Designers use it to gather raw swatches before a palette takes shape; developers reach for it when seeding databases, building color-picker components, or stress-testing contrast checkers.
List•2 inputsClick to open →
Generador de códigos CVV aleatorios
Genera códigos CVV/CVC aleatorios de 3 o 4 dígitos para probar formularios de pago
A random CVV code generator saves developers and QA engineers from touching live card credentials when testing payment flows. CVV codes are the 3 or 4 digit numeric security codes printed on payment cards — Visa, Mastercard, and Discover use 3-digit codes, while American Express uses a 4-digit CID.
List•2 inputsClick to open →
Generador de IDs de Empleado
Genera códigos de ID de empleado o personal con formato para RR. HH. y sistemas de negocio
An employee ID generator lets HR teams, developers, and system admins produce batches of consistently formatted staff identification codes in seconds. Migrating records into Workday, seeding a staging database, or printing access badges all require IDs that follow a fixed structure — and building that list by hand wastes time and introduces typos.
List•3 inputsClick to open →
Selector de Números Aleatorios
Selecciona un conjunto de números aleatorios únicos de un rango definido: perfecto para sorteos y rifas
A random number picker selects a set of unique numbers from a defined range — no repeats, no bias, no manual draws. Set your minimum, maximum, and how many numbers to pick, and the tool returns a clean, sorted list in under a second.
List•3 inputsClick to open →
Generador de códigos de verificación aleatorios
Genera códigos de verificación alfanuméricos para flujos de confirmación por correo o SMS
A random verification code generator saves real time when you're building email verification flows, SMS OTP systems, or account activation pipelines. Set the code length to match your production system — six digits for SMS, eight characters for email activation — choose alphanumeric, numeric, or letters-only format, and generate up to hundreds of codes in one batch.
List•3 inputsClick to open →
Generador de Listas de Porcentajes Aleatorios
Genera una lista de valores porcentuales aleatorios dentro de un rango definido
A random percentage list generator lets you produce batches of realistic percentage values in seconds — no scripting required. Set your min and max to scope the range (60–95 for pass rates, 0.5–4.5 for interest simulations), choose decimal precision from zero to four places, and set a count up to whatever your project needs.
List•4 inputsClick to open →
Generador de Pares Clave-Valor con UUID
Genera pares clave-valor con UUID con formato JSON, ENV o texto plano para archivos de configuración
A UUID key-value pair generator is the fastest way to scaffold config files, seed test environments, and fill credential placeholders without manual typing. Set a key prefix like DB_PASSWORD or STRIPE_WEBHOOK_SECRET, pick a count, and choose ENV, JSON, or Plain output — the result drops straight into a dotenv file, a config.json object, or a Terraform variables block.
List•3 inputsClick to open →
Generador de Puertos de Red Aleatorios
Genera números de puerto de red disponibles aleatorios para desarrollo y pruebas
A random network port generator is the fastest way to grab a conflict-free batch of port numbers for containers, services, or test environments without staring at a spreadsheet. Port space is divided into three ranges: well-known (0–1023) for system protocols, registered (1024–49151) for applications, and dynamic (49152–65535) for OS-assigned ephemeral sockets.
List•3 inputsClick to open →
Generador de códigos de color RGB aleatorios
Genera valores de color RGB aleatorios con equivalentes hex para diseño y desarrollo
A random RGB color code generator is the fastest way to get fresh color values when you're staring at a blank canvas or need test data for a UI component. Each result gives you both the rgb() function syntax and the matching #rrggbb hex code — no manual conversion needed.
List•2 inputsClick to open →
Generador de Números Aleatorios con Exclusiones
Genera números aleatorios dentro de un rango excluyendo valores específicos
A random number with exclusions generator does what basic random tools can't: produce results that deliberately skip values you specify. Testers, game developers, and raffle organizers all hit the same wall — a standard range picker has no concept of reserved or already-used numbers.
List•4 inputsClick to open →
Generador de Pares de Tokens de API
Genera pares de tokens de API público/secreto coincidentes para sistemas de autenticación
An API token pair generator creates matching public and secret key pairs that mirror the authentication patterns used by production services like Stripe, Twilio, and SendGrid. Each pair has a public key that identifies the client and a secret key that signs or authenticates requests — structure developers need constantly but rarely have good dummy data for.
List•3 inputsClick to open →
Lote de números aleatorios con estadísticas
Genera un lote de números aleatorios y muestra la suma, la media, el mínimo, el máximo y el rango
A random number batch with statistics generator does more than spit out numbers — it instantly computes sum, mean, median, min, max, and range for every batch you create. Set how many numbers you need (up to 500), define your lower and upper bounds, and the tool handles all the arithmetic in one click.
Text•3 inputsClick to open →
Generador de códigos estilo VIN
Genera códigos realistas estilo número de identificación de vehículo (VIN) para pruebas
A VIN-style code generator produces realistic 17-character Vehicle Identification Numbers for testing, database seeding, and UI prototyping — without touching real vehicle records. Every code follows the ISO 3779 structure: a 3-character World Manufacturer Identifier (WMI), 6-character Vehicle Descriptor Section (VDS), and 8-character Vehicle Identifier Section (VIS).
List•2 inputsClick to open →
Generador de Listas de Números con Ceros a la Izquierda
Genera números secuenciales o aleatorios rellenados con ceros con prefijo y sufijo personalizados
A zero-padded number list generator solves one of the most persistent formatting problems in business and data work: keeping IDs aligned, sortable, and consistent. Invoice numbers, ticket codes, SKUs, employee IDs — they all break when string sorting treats '10' as less than '2'.
List•6 inputsClick to open →
Generador de PIN Memorables
Genera PIN usando patrones de dígitos memorables que son más fáciles de recordar
A memorable PIN generator builds numeric codes around patterns — rhyming pairs like 3344, mirrored sequences like 2442, ascending chunks, or alternating digits like 4747 — so they stick in memory far more reliably than random strings. The trade-off is real: patterned PINs sacrifice some entropy for recall speed, which makes them right for low-stakes situations like kiosk entry codes, shared household locks, or temporary credentials communicated verbally.
List•3 inputsClick to open →
Generador de IDs Hash Cortos
Genera IDs cortos al estilo hash y seguros para URL, similares a los enlaces de YouTube o Bitly
A short hash ID generator creates the compact alphanumeric codes you see in YouTube links, Bitly slugs, and referral URLs — packing enormous uniqueness into a small footprint. This tool lets you set the ID length, how many to generate, and which character set to use: mixed-case alphanumeric, lowercase-only, uppercase-only, or digits only.
List•3 inputsClick to open →
Generador de Cartones de Números Estilo Bingo
Genera cartones de números estilo bingo imprimibles con cuadrículas aleatorias
This random bingo-style number card generator creates freshly shuffled, print-ready grids in seconds — no signup, no software. Pick a 3×3, 4×4, or 5×5 layout, set your maximum number, and toggle the classic FREE centre space on or off.
Grid•3 inputsClick to open →
Generador de matrices de números aleatorios
Genera una cuadrícula de números aleatorios con filas, columnas y rango personalizados
A random number matrix generator gives you an instant grid of integers with full control over rows, columns, and value range. Developers use it to seed test databases, stress-test algorithms, and build synthetic datasets without writing setup code.
Text•4 inputsClick to open →
Generador de Vista Previa de OTP Basadas en Tiempo
Genera contraseñas de un solo uso basadas en tiempo de ejemplo al estilo TOTP de 6 u 8 dígitos
The time-based OTP preview generator produces realistic 6-digit and 8-digit one-time password codes for design mockups, component testing, and documentation. Building a 2FA flow means you need convincing sample codes long before real TOTP infrastructure is wired up.
List•2 inputsClick to open →
Generador de Lotes de Números Primos Aleatorios
Genera una lista de números primos aleatorios dentro de un rango especificado
A random prime number batch generator gives you instant access to real primes sampled from any range you define — no lookup tables, no manual sieve. Set an upper limit and a count, and the tool pulls a randomized subset from every valid prime in that range.
List•2 inputsClick to open →
Generador de Números IMEI de Prueba
Genera números IMEI con formato válido para pruebas y desarrollo de dispositivos
A test IMEI number generator gives developers and QA engineers a fast source of correctly structured, Luhn-valid 15-digit identifiers — without touching real device data. Building a mobile device management platform, a repair shop tracking system, or any telecom app that ingests IMEI input means you need numbers that pass validation logic, not arbitrary strings that blow up before you reach the feature under test.
List•1 inputClick to open →
Generador de BIN de Tarjeta de Prueba
Genera Números de Identificación Bancaria (BIN) de muestra para pruebas de sistemas de pago
A test credit card BIN generator gives developers and QA engineers structurally valid Bank Identification Numbers without touching live card data. The BIN — the first 6 digits of any payment card — tells a processor which network to route through, which bank issued the card, and what rules apply before a transaction is even authorized.
List•2 inputsClick to open →
Generador de Particiones de Enteros Aleatorias
Divide un número en partes aleatorias que suman el total
A random integer partition generator splits a whole number into a set count of parts that sum exactly to your chosen total. Unlike even division, each result is randomized — so you get a realistic, varied spread instead of identical slices.
List•3 inputsClick to open →
Generador de Lotes de ULID
Genera Identificadores Únicos Universales Ordenables Lexicográficamente (ULID)
A ULID batch generator is the fastest way to produce spec-compliant, lexicographically sortable identifiers without spinning up a library or runtime. ULIDs are 26-character strings built from a 48-bit millisecond timestamp and 80 bits of Crockford Base32 randomness — sortable by creation time, URL-safe, and free of hyphens.
List•2 inputsClick to open →
Generador de Direcciones de Monedero Cripto Aleatorias
Genera direcciones de monedero de criptomonedas con formato aleatorio para pruebas
A random crypto wallet address generator gives developers and designers format-accurate blockchain addresses without touching a live network or risking real funds. Need to seed a test database, populate a Figma mockup, or write API docs?
List•2 inputsClick to open →
Generador de Subredes IP Aleatorias
Genera direcciones IPv4 aleatorias dentro de una subred o rango CIDR específico
A random IP subnet generator gives network engineers, QA testers, and developers a fast way to produce realistic IPv4 addresses without touching a live network. Enter a subnet prefix — 10.0, 172.16, or 192.168 — and the tool randomizes the remaining octets, returning a clean batch of properly formatted addresses ready for test fixtures, config files, or log simulators.
List•2 inputsClick to open →
Generador de Lotes de Tokens Hex
Genera múltiples tokens hexadecimales aleatorios de longitud configurable
A hex token batch generator is the fastest way to produce multiple unique hexadecimal tokens in one click, saving developers from writing one-off scripts every time they need test data or placeholder secrets. Hex tokens are the de-facto format for API keys, session identifiers, CSRF tokens, and webhook secrets because they pack high entropy into a compact, URL-safe string of characters 0–9 and a–f.
List•3 inputsClick to open →
Generador de números para cartones de bingo
Genera un cartón de bingo único con números aleatorios en una cuadrícula de 5x5
A bingo card number generator removes the pain of hand-drawing grids for game nights, classrooms, and charity fundraisers. This tool produces a 5x5 card with numbers randomly distributed across the classic B-I-N-G-O columns — B draws from 1–15, I from 16–30, N from 31–45, G from 46–60, and O from 61–75 by default.
Text•2 inputsClick to open →
Generador de Pares de Números Aleatorios
Genera pares de números aleatorios, ideales para coordenadas, rangos o datos de prueba
A random number pair generator creates two independent numbers side by side — perfect for coordinates, min-max ranges, and paired test data. Set your own min and max bounds, choose how many pairs you need (default is 5), and pick a separator: comma, dash, colon, or slash.
List•4 inputsClick to open →
Generador de UUID personalizados
Genera UUIDs con un prefijo personalizado incrustado en el primer segmento
A vanity UUID generator lets you embed a recognizable hex prefix into the first segment of any UUID, making identifiers instantly spottable in logs, seed files, and debug output. Instead of scanning walls of random characters, you see records like deadbeef-...
List•2 inputsClick to open →
Generador de Tablas de Porcentajes Aleatorias
Genera una tabla de porcentajes aleatorios que suman 100%
A random percentage table generator creates values that sum to exactly 100%, spread across any category names you define. Designers, developers, and educators all reach for this kind of tool when real data isn't ready yet.
Text•2 inputsClick to open →
Generador de Contraseñas al Estilo XKCD
Genera contraseñas fuertes pero memorables usando palabras comunes aleatorias al estilo XKCD
The XKCD-style password generator creates strong, memorable passwords by chaining random common words — the method made famous by XKCD comic strip 936's "correct horse battery staple" example. Four random words from a 2,000-word list produces over 160 billion combinations, making brute-force attacks impractical without the visual noise of "Tr0ub4dor&3".
List•4 inputsClick to open →
Generador de Tablas de Números Aleatorios en CSV
Genera una tabla de números aleatorios con formato CSV para importar en hojas de cálculo
A random number table CSV generator saves hours of manual entry by producing a clean, importable grid of integers in seconds. Set your row and column counts, define a min and max range, toggle column headers on or off, and you get a properly formatted comma-separated file ready for Excel, Google Sheets, pandas, or R.
Text•5 inputsClick to open →
Generador de Números Divisibles Aleatorios
Genera números aleatorios que son divisibles por un valor elegido
A random divisible number generator produces exact multiples of any divisor you choose, within a range and count you control. Set your divisor, define a min and max, and pick how many results you need — the tool returns a clean list of qualifying integers instantly, with no duplicates and no manual calculation.
List•4 inputsClick to open →
Generador de Códigos Alfanuméricos Aleatorios
Genera códigos alfanuméricos aleatorios en longitudes y formatos configurables
A random alphanumeric code generator gives you formatted codes for gift cards, license keys, referral programs, and verification tokens in seconds — no spreadsheet, no script. Control the character set (uppercase, lowercase, digits, or mixed), code length, quantity, and grouping format.
List•5 inputsClick to open →
Generador de Números Negativos Aleatorios
Genera enteros o decimales negativos aleatorios dentro de un rango elegido
A random negative number generator is a practical tool for developers, data scientists, and educators who need batches of negative integers or decimals on demand. Instead of writing a script or hardcoding values, you set a range, choose a count, and get results in seconds.
List•4 inputsClick to open →
Generador de Números Aleatorios sin Repetición
Genera un conjunto de números aleatorios únicos sin duplicados
A random number generator without repetition is exactly what you need when every pick must be unique — no duplicates, no do-overs. Whether you're running a raffle, simulating a card draw, or pulling a statistical sample, repeated values break the logic entirely.
List•4 inputsClick to open →
Generador de Contraseñas en Masa
Genera varias contraseñas aleatorias y fuertes a la vez en distintos formatos
A bulk password generator solves a specific bottleneck: you need dozens of strong, unique passwords right now, not one at a time. Sysadmins use it when onboarding new employees, developers use it to seed staging databases, and security teams use it to populate test fixtures.
List•5 inputsClick to open →
Generador de Números de Dos Cifras Aleatorios
Genera números de dos cifras aleatorios (10–99) para juegos, concursos y educación
A random two-digit number generator creates integers from 10 to 99 with no pattern or bias — exactly what teachers, quiz hosts, and game designers need for fair, repeatable draws. Every result is guaranteed to have two digits, so you never have to discard outliers.
List•3 inputsClick to open →
Generador de Números Hexadecimales Aleatorios
Genera números hexadecimales aleatorios para programación y desarrollo de bajo nivel
A random hexadecimal number generator built for developers, hardware engineers, and designers who need correctly formatted hex values on demand. Populate C struct definitions with 32-bit register values, mock 8-bit byte sequences for fuzzing, or spin up bulk CSS color codes — all from one tool.
List•5 inputsClick to open →
Generador de IDs Basados en Timestamp
Genera IDs únicos ordenables combinando un timestamp con caracteres aleatorios
A timestamp-based ID generator builds sortable unique identifiers by combining a Unix millisecond timestamp with a random character suffix. Unlike UUIDs, these IDs encode creation time directly in the identifier, so records sort chronologically without a separate created_at column.
List•4 inputsClick to open →
Generador de Números Complejos Aleatorios
Genera números complejos aleatorios en notación a+bi para matemáticas e ingeniería
A random complex number generator built for mathematicians, engineers, and developers who need realistic test data fast. Complex numbers appear throughout AC circuit analysis, Fourier transforms, control theory, and quantum computing — and handwriting batches of them is slow and biased toward tidy values.
List•5 inputsClick to open →
Generador de Números Aleatorios Sin Duplicados
Genera un conjunto de números aleatorios únicos sin repeticiones dentro de un rango dado
A random numbers without duplicates generator solves a specific problem: you need a set of integers where no value can appear twice. Raffles, lotteries, exam seat assignments, and statistical samples all share this constraint — one repeated number breaks the result entirely.
List•3 inputsClick to open →
Generador de Expresiones Cron Aleatorias
Genera expresiones cron aleatorias válidas para programar tareas
A random cron expression generator saves you from hand-crafting the five-field syntax every time you need a valid schedule string. Developers use it to seed test fixtures, populate job queue databases, or prototype automation configs without memorizing wildcard and step-value rules.
List•2 inputsClick to open →
Generador de Listas de Direcciones IP Aleatorias
Genera listas de direcciones IPv4 o IPv6 aleatorias para pruebas y desarrollo
A random IP address list generator saves developers and network engineers from hand-crafting test data that needs to look realistic but carry no production risk. Set your count and choose IPv4, IPv6, or both — the tool outputs properly formatted addresses instantly.
List•2 inputsClick to open →
Generador de Números Aleatorios con Formato
Genera números aleatorios con formatos personalizados como moneda, notación científica o decimales fijos
The formatted random number generator produces random values styled exactly how you need them — currency, scientific notation, comma-separated thousands, or fixed decimals — with no manual reformatting afterward. Set your min, max, count, and format, and the output is ready to paste directly into code, a spreadsheet, or a design file.
List•4 inputsClick to open →
Generador de Contraseñas con Patrón Personalizado
Genera contraseñas que siguen un patrón de caracteres personalizado como 'AAA-000-aaa'
The custom pattern password generator lets you define a character-level template and instantly produce passwords or codes that match it exactly. Use A for uppercase, a for lowercase, 0 for a digit, # for a special character, and * for any class — every other character stays literal.
List•2 inputsClick to open →
Generador de Números con Distribución
Genera números aleatorios que siguen distribuciones normal, uniforme o exponencial
A random number distribution generator does something plain random functions can't: it shapes the output to match how real data actually behaves. Set the distribution to normal and numbers cluster around your chosen mean, tapering off toward the tails.
List•4 inputsClick to open →
Generador de Códigos de Color Hex Aleatorios
Genera códigos de color hex aleatorios, con filtro opcional por rango de tono o brillo
A random hex color code generator saves time whenever you need a palette fast — no design tool open, no decision fatigue. Paste the output straight into CSS, a Tailwind config, Figma color styles, or a p5.js sketch.
List•3 inputsClick to open →
Generador de Fechas Aleatorias
Genera fechas aleatorias dentro de un rango especificado en varios formatos
A random date generator sounds simple, but getting realistic, spread-out dates across a specific year range is surprisingly tedious to do by hand. This tool lets you set a start year, end year, and count, then pick from five formats — YYYY-MM-DD, DD/MM/YYYY, MM/DD/YYYY, DD Mon YYYY, or full ISO 8601 with time — and produces the whole batch instantly.
List•4 inputsClick to open →
Generador de Números Aleatorios en Cualquier Base
Genera números aleatorios expresados en binario, octal, hex, base32 o cualquier base del 2 al 36
The random number in any base generator produces values in binary, octal, decimal, hex, base32, base36, or any base from 2 to 36 — with control over digit length and letter casing. Set the digit count to 8 and you get consistently padded output, which matters when populating fixed-width fields or building test vectors.
List•4 inputsClick to open →
Generador de Números de Cuenta Bancaria Aleatorios
Genera números de cuenta bancaria y códigos de sucursal aleatorios con aspecto realista para pruebas
A random bank account number generator is a must-have tool for fintech developers and QA engineers who need realistic financial test data without touching live customer records. This one produces fictitious UK sort code and account number pairs, US ABA routing numbers, IBAN-style strings, and generic 10- or 16-digit numbers — pick the format that matches your target system and set the count to generate up to hundreds of records at once.
List•2 inputsClick to open →
Generador de Códigos RGB Aleatorios
Genera códigos de color RGB aleatorios con valores para los canales rojo, verde y azul
A random RGB code generator is the fastest way to get usable color values when you need them without manually picking each shade. Each code is built from three independent channels — red, green, and blue — each ranging from 0 to 255, giving over 16 million possible combinations.
List•2 inputsClick to open →
Generador de PINs por Lotes
Genera varios códigos PIN numéricos únicos de longitud personalizable con un clic
A batch PIN generator saves real time when you need dozens of codes at once — not one at a time. Set the count (up to 10 by default, adjustable), choose a length from 4 to 12 digits, and toggle duplicate checking on or off.
List•3 inputsClick to open →
Generador de Pares de Tokens Hex
Genera pares de tokens hex coincidentes para usar como pares clave-secreto o de credenciales de cliente
A hex token pair generator creates matched key-secret pairs as hex strings — the foundation of API authentication, OAuth client credentials, and webhook signing. The key acts as a public identifier (safe to log and transmit); the secret proves identity and stays private.
List•3 inputsClick to open →
Generador de Secuencias de Fibonacci Aleatorias
Genera secuencias al estilo Fibonacci a partir de números semilla aleatorios
A random Fibonacci sequence generator lets you build number series that follow Fibonacci growth rules but start from randomly chosen seed pairs instead of the fixed 0 and 1. Every run produces sequences with the same exponential structure yet entirely different values.
List•3 inputsClick to open →
Generador de Datos de Código de Barras EAN-13
Genera números de código de barras EAN-13 aleatorios con dígitos de control válidos para pruebas
The EAN-13 barcode data generator produces random 13-digit codes with correctly calculated check digits — valid enough to pass any scanner or retail software, but not registered in any GS1 database. That combination is exactly what QA engineers and backend developers need when testing product pipelines, barcode readers, or import logic without touching licensed inventory.
List•2 inputsClick to open →
Generador de Números con Prefijo y Sufijo
Genera números aleatorios con formato y prefijos y sufijos personalizados para códigos e IDs
A number with prefix & suffix generator solves a specific, tedious problem: producing batches of structured codes like ORD-004521 or INV-001234-2025 without hand-typing or writing a script. Set your prefix (try PO-, TKT-, or SKU-), optional suffix for year or region, digit count, and whether to zero-pad — then pull up to 100 codes in one click.
List•5 inputsClick to open →
Generador de Números Aleatorios Curiosos
Genera números aleatorios acompañados de datos contextuales sobre sus propiedades matemáticas
This interesting random number generator does more than pick a digit at random — it instantly labels each result with its core mathematical properties. Every number shows whether it's prime, a perfect square, a Fibonacci number, a perfect number, or divisible by common factors like 2, 3, 5, and 10.
List•3 inputsClick to open →
Generador de IDs Alfanuméricos Aleatorios
Genera IDs alfanuméricos cortos y aleatorios para usar como códigos únicos, slugs o identificadores
A random alphanumeric ID generator is the fastest way to produce clean, configurable identifiers without writing a script. Unlike full UUIDs (36 characters, fixed format), these IDs scale to exactly what you need — a 6-character promo code, a 12-character slug, a 20-character internal key.
List•4 inputsClick to open →
Generador de Tiradas Combinadas de Dados
Lanza combinaciones de distintos tipos de dados (d4, d6, d8, d10, d12, d20, d100) y muestra los totales
The dice combination roll generator lets you roll any mix of standard polyhedral dice — d4, d6, d8, d10, d12, d20, and d100 — in a single click, with a flat modifier added to the total. Set each die type independently, enter a positive or negative modifier, and get individual results alongside the grand total.
Text•8 inputsClick to open →
Generador de Cuadrículas de PINs Aleatorios
Genera una cuadrícula imprimible de PINs aleatorios para tarjetas rasca, vales o distribución masiva de PINs
A random PIN grid generator gives you a fast, no-code way to produce batches of numeric PINs for scratch cards, vouchers, loyalty programmes, and bulk access code distribution. Set your PIN length (4–8 digits) and choose how many you need (up to 50), and the tool outputs a clean, printable grid in seconds.
Grid•2 inputsClick to open →
Generador de Direcciones IPv4 Aleatorias
Genera direcciones IPv4 aleatorias, opcionalmente dentro de un rango de subred personalizado
A random IPv4 address generator is the fastest way to get correctly formatted, range-accurate IP addresses for test data, mock configs, and network simulations. Pick a count, choose your address type — public, 192.168.x.x, 10.x.x.x, or 172.16.x.x — and copy the results straight into your script or fixture file.
List•2 inputsClick to open →
Generador de Números Aleatorios con Intervalos
Genera números aleatorios dentro de un rango que son múltiplos de un valor de paso elegido
A step-interval random number generator produces random values that fall on exact multiples of a chosen step within your defined range. Unlike a plain random number generator, every result snaps to your interval — set a step of 5 between 0 and 100, and you'll only get values like 0, 5, 10, 15.
List•4 inputsClick to open →
Generador de Códigos Aleatorios Estilo Checksum y Hash
Genera códigos hex aleatorios estilo checksum en formatos CRC32, MD5 y SHA para datos simulados y pruebas
A random checksum and hash-style code generator produces hex strings that match the exact length and character format of CRC32, MD5, SHA-1, and SHA-256 outputs. Developers need placeholder hash values long before real data exists — a file dashboard needs something in the checksum column during prototyping, an API contract needs example response bodies, a test database needs rows that look production-realistic.
List•3 inputsClick to open →
Generador Simulado de Caducidad y CVV de Tarjeta
Genera fechas de caducidad y códigos CVV de tarjeta falsos y realistas para pruebas de UI y desarrollo de formularios
A mock card expiry & CVV generator gives front-end developers and QA engineers realistic test data for building and validating payment forms without using real card details. Fake expiry dates in MM/YY format paired with randomized CVV codes let you populate checkout flows, stress-test validators, and catch edge cases before they reach production.
List•3 inputsClick to open →
Generador de Números Aleatorios en Múltiples Formatos
Genera un número aleatorio y lo muestra simultáneamente en decimal, hex, binario, octal y notación científica
A random number in multiple formats generator produces a single value and displays it simultaneously in decimal, hex, binary, octal, and scientific notation — no manual conversion needed. Set a minimum and maximum (default 0–65535 covers the full 16-bit unsigned integer space), click generate, and every representation appears at once.
List•2 inputsClick to open →
Generador de Números de Ruta ABA Falsos
Genera números de ruta ABA falsos estructuralmente válidos para pruebas bancarias de EE. UU. y desarrollo de formularios financieros
A fake ABA routing number generator creates structurally valid 9-digit codes that satisfy the official 3-7-1 checksum algorithm, making them format-indistinguishable from real routing numbers. Financial forms, ACH pipelines, and payroll platforms reject malformed input before reaching any real logic — so testing with random digits wastes cycles on avoidable errors.
List•2 inputsClick to open →
Generador de Números Aleatorios entre Dos Valores
Genera enteros o decimales aleatorios entre un valor mínimo y máximo
A random number between two values generator solves a simple but recurring problem: you need one or more numbers inside a specific range, right now, without opening a spreadsheet or writing a script. Set a minimum, set a maximum, choose how many numbers you want, and optionally dial in decimal precision.
List•4 inputsClick to open →
Generador de contraseñas con símbolos
Genera contraseñas aleatorias seguras con conjuntos de caracteres personalizables que incluyen símbolos
A password with symbols generator creates strong, random credentials that are computationally impractical to brute-force. Adding symbols like @, #, and !
List•5 inputsClick to open →
Generador de PIN Aleatorios de 4 Dígitos
Genera códigos PIN aleatorios de 4 dígitos, evitando opcionalmente dígitos repetidos o secuenciales
A random 4-digit PIN generator removes the guesswork — and the bias — from creating numeric passcodes. People instinctively reach for birth years, repeated digits, or simple runs like 1234, which are the first combinations any attacker tries.
List•3 inputsClick to open →
Generador de Cadenas de Hash Aleatorias
Genera cadenas hex aleatorias tipo hash con longitudes de MD5, SHA-1 o SHA-256
A random hash string generator produces hex strings that match the exact length and character format of real cryptographic hashes — MD5 (32 chars), SHA-1 (40 chars), SHA-256 (64 chars), or SHA-512 (128 chars). These aren't real digests of any input; they're plausible-looking placeholders for developers who need correctly formatted mock values before real data exists.
List•3 inputsClick to open →
Generador de Códigos de Verificación Numéricos
Genera códigos de verificación o tipo OTP numéricos aleatorios de cualquier longitud de dígitos
A numeric verification code generator saves real time when you need realistic OTP-style codes without spinning up an authentication backend. Developers, QA engineers, and UX designers all hit the same wall: registration flows, onboarding screens, and test fixtures need codes that look authentic but carry zero security risk.
List•3 inputsClick to open →
Generador de Formato de SSN de Prueba Aleatorio
Genera números con formato de SSN falsos solo para pruebas y desarrollo
A random test SSN format generator solves a real problem for developers and QA engineers: you need nine-digit SSN-shaped data that exercises your validation logic, regex patterns, and database columns — without touching anything tied to a real person. This tool produces synthetic SSN strings in three formats: dashed (123-45-6789), plain digits (123456789), or masked (***-**-6789) for redaction testing.
List•2 inputsClick to open →
Generador de UUID con Prefijo Personalizado
Genera identificadores UUIDv4 con un prefijo personalizado para IDs con espacio de nombres
A UUID with custom prefix generator creates namespaced identifiers that instantly signal entity type — think user_550e8400-e29b-41d4-a716 or order_f47ac10b. Platforms like Stripe (ch_, cus_, pi_), Clerk (user_, org_), and PlanetScale popularized this pattern because a raw UUID in a stack trace tells you nothing, but invoice_ tells you exactly what broke.
List•4 inputsClick to open →
Generador de Números Aleatorios sin Repeticiones
Genera un conjunto de números aleatorios únicos sin duplicados en un rango dado
A random numbers without repeats generator produces a set of unique integers within a range you define — no duplicates, no manual filtering. This matters whenever selection logic demands each value appear exactly once: lottery draws, raffle tickets, student seat assignments, or survey sampling.
List•3 inputsClick to open →
Generador de Direcciones IPv6 Aleatorias
Genera direcciones IPv6 válidas aleatorias para pruebas y desarrollo
A random IPv6 address generator saves network developers, QA engineers, and DevOps teams from writing syntactically correct test addresses by hand. IPv6 follows a strict 128-bit format — eight groups of four hex digits — and a single typo invalidates the address entirely.
List•2 inputsClick to open →
Generador de número aleatorio en varias bases
Genera un número aleatorio y lo muestra en binario, octal, decimal y hexadecimal
A random number in multiple bases generator saves the manual conversion step developers and CS students waste time on constantly. Set a decimal range — the default 0–255 covers a single unsigned byte — click generate, and the tool immediately shows the same integer in binary, octal, decimal, and hexadecimal side by side.
Text•2 inputsClick to open →
Generador de Números Aleatorios Gaussianos (Distribución Normal)
Genera números aleatorios que siguen una distribución normal con media y desviación estándar personalizadas
A random Gaussian number generator produces values that follow a normal (bell curve) distribution, where most results cluster near a central mean and fewer appear toward the extremes. Set the mean (μ), standard deviation (σ), count, and decimal places to get a clean list of realistic synthetic numbers in seconds.
List•4 inputsClick to open →
Generador de Contraseñas por Lotes
Genera múltiples contraseñas únicas a la vez con longitud y conjuntos de caracteres configurables
A batch password generator is the fastest way to create dozens of strong, unique passwords without recycling credentials or inventing strings by hand. Set the count (up to 50), pick a length, and toggle uppercase and symbols to match your target system's requirements — every password is independently randomized in one click.
List•4 inputsClick to open →
Generador de Cartones de Números de Bingo
Genera una cuadrícula de cartón de bingo aleatoria con números organizados en el formato clásico de columnas BINGO
This bingo number card generator creates a complete, print-ready 5x5 card in seconds, following standard 75-ball rules. Each column draws from its correct range: B pulls from 1–15, I from 16–30, N from 31–45, G from 46–60, and O from 61–75.
Grid•1 inputClick to open →
Generador de Códigos de Color Hex Aleatorios
Genera códigos de color hex aleatorios para diseño y desarrollo
A random hex color code generator gives you instant access to colors across the full 16.7-million-color RGB spectrum, each formatted as a standard six-character #RRGGBB string ready to drop into any design or development workflow. Stress-testing a UI component with unexpected values, seeding a database, or escaping a stale palette — a batch of genuinely random colors removes the blank-canvas paralysis that slows creative work.
List•1 inputClick to open →
Generador de Direcciones IPv4 Aleatorias
Genera direcciones IPv4 aleatorias para pruebas y desarrollo
A random IPv4 address generator is a practical tool for developers and QA engineers who need realistic IP data without touching production systems. Generate addresses in standard dotted-decimal notation and choose between public, private, or any valid range.
List•2 inputsClick to open →
Generador de Listas de Números Aleatorios
Genera una lista personalizable de números aleatorios dentro de un rango especificado
A random number list generator lets you produce a custom batch of integers instantly — no spreadsheets, no code, no manual work. Set your minimum and maximum, choose how many numbers you need (up to 500 per run), and toggle unique mode to prevent duplicates.
List•4 inputsClick to open →
Generador de Códigos de Recuperación
Genera un conjunto de códigos de respaldo de un solo uso para la autenticación de dos factores
A recovery code generator creates sets of one-time backup codes used to regain account access when your 2FA device is unavailable. This tool produces alphanumeric codes in three formats — XXXX-XXXX, XXXXXXXX, or XXXX-XXXX-XXXX — matching the structures used by platforms like GitHub, Stripe, and Google Workspace.
List•2 inputsClick to open →
Generador de Números de Cartón de Bingo
Genera una cuadrícula de cartón de bingo aleatoria con casillas numeradas
A bingo card number generator removes the prep work from running a game — no spreadsheets, no manual shuffles, no duplicate cards. Set your grid size (3×3, 4×4, or 5×5) and your maximum number, then click once to get a fully randomised card with no repeated values.
Grid•2 inputsClick to open →
Generador de Marcas de Tiempo Unix Aleatorias
Genera marcas de tiempo epoch Unix aleatorias dentro de un rango de fechas personalizable
A random Unix timestamp generator solves a tedious problem every backend developer hits: you need realistic epoch values fast, without writing a throwaway script or computing offsets by hand. This tool produces batches of timestamps across any date range you define, outputting values in seconds, milliseconds, or both formats at once, each paired with a human-readable date string so you can sanity-check results immediately.
List•4 inputsClick to open →
Generador de Códigos de Color Hex Aleatorios
Genera códigos de color hex aleatorios para diseño y desarrollo
A random color hex code generator gives designers and developers instant, valid six-digit HTML/CSS color codes without manually constructing them. Each code represents a unique RGB value across the full 16.7 million color space, ready to paste directly into a stylesheet, Figma canvas, or JavaScript variable.
List•1 inputClick to open →
Generador de Frases de Contraseña
Genera frases de contraseña memorables a partir de palabras comunes aleatorias
A passphrase generator builds secure, memorable credentials by stringing together random common words — far easier to recall than a tangle of symbols, and often stronger too. Security comes from the size of the word pool and how many words you pick, not from character complexity.
Text•2 inputsClick to open →
Generador de direcciones IPv4 aleatorias
Genera direcciones IPv4 válidas y aleatorias para pruebas y desarrollo
A random IPv4 address generator is an essential tool for developers, QA engineers, and network professionals who need realistic IP data without hand-crafting every address. Seeding a user-activity log with fake client IPs, populating a Postgres staging table, or testing a geo-IP lookup function all require valid, correctly formatted addresses — and doing that manually at scale is tedious.
List•2 inputsClick to open →
Generador de números aleatorios en rango
Genera una lista de números aleatorios dentro de un rango mínimo y máximo personalizado
A random numbers in range generator solves a simple but tedious problem: you need a list of integers between two bounds, fast, without touching a spreadsheet formula. Set your minimum, maximum, and count, then choose whether duplicates are allowed.
List•4 inputsClick to open →
Generador masivo de UUID con opciones de formato
Genera múltiples UUID con opciones de formato como mayúsculas o sin guiones
A bulk UUID generator with format options removes the friction of producing dozens of version 4 UUIDs by hand. Choose from four output formats — standard hyphenated, uppercase, no-hyphens, or brace-wrapped — and generate up to 100 UUIDs in a single pass.
List•2 inputsClick to open →
Generador de números de tarjeta de crédito falsos
Genera números de tarjeta de crédito falsos pero válidos según Luhn para pruebas
A fake credit card number generator that produces Luhn-valid test numbers is one of the most practical tools a developer can keep bookmarked. Every major payment network uses the Luhn algorithm to reject obviously invalid card numbers at the front end, which means your test data needs to pass that same check or your forms will reject it before you can test anything meaningful.
List•2 inputsClick to open →
Generador de cuadrícula de PIN
Genera una cuadrícula de PIN aleatorios para impresión por lotes o pruebas de seguridad
A PIN grid generator lets you create batches of numeric PIN codes in seconds, replacing tedious manual work when you need codes for scratch cards, event badges, loyalty vouchers, or access control systems. Set the count up to 50 and the digit length from 4 to 8 to match your security requirements.
Grid•2 inputsClick to open →
Generador de códigos de cupón aleatorios
Genera lotes de códigos de cupón y promoción únicos con prefijo opcional
A random coupon code generator produces batches of unique, hard-to-guess promo codes for campaigns, giveaways, loyalty rewards, and testing. Each code is built from an unambiguous character set that deliberately omits easily-confused characters like O and 0 or I and 1, so customers can read and type them without errors.
List•3 inputsClick to open →
Generador de matrículas aleatorias
Genera números de matrícula de vehículo falsos en formatos de EE. UU. y Europa
A random license plate generator produces fake vehicle registration numbers in recognisable formats — US (ABC-1234), UK (AB12 CDE), and a generic European style. The plates look authentic but belong to no real vehicle, which makes them ideal test data for parking apps, fleet-management systems, traffic simulations, games, and database seed scripts.
List•2 inputsClick to open →
Generador de porcentajes aleatorios
Genera porcentajes aleatorios dentro de un rango, con decimales opcionales
A random percentage generator produces percentages within a range you choose, with optional decimal places. It is useful whenever you need believable percentage values — dummy progress bars, mock survey results, test data for charts and dashboards, randomised discounts, or classroom probability examples.
List•4 inputsClick to open →
Generador de IBAN falsos
Genera números IBAN falsos pero con formato válido para probar formularios de pago y banca
A fake IBAN generator produces International Bank Account Numbers in the correct country format and length — for example a 22-character UK or German IBAN, or a 27-character French one — without corresponding to any real account. They are built for testing: filling banking and payment forms, exercising IBAN field validation and formatting, and seeding development databases without touching real financial data.
List•2 inputsClick to open →
Generador de números primos
Enumera números primos a partir de un valor elegido
A prime number generator lists prime numbers — whole numbers greater than one that are divisible only by one and themselves, like 2, 3, 5, 7, and 11. Primes are the building blocks of arithmetic and turn up everywhere from cryptography to hashing to maths homework, but listing them by hand means testing each number for factors.
List•2 inputsClick to open →
Generador de la sucesión de Fibonacci
Genera la sucesión de Fibonacci hasta cualquier longitud
A Fibonacci sequence generator builds the famous number pattern where each term is the sum of the two before it: 0, 1, 1, 2, 3, 5, 8, 13, and on. The sequence appears throughout nature, art, and computer science — in spiral shells, flower petals, and classic programming exercises — and its ratio of neighbouring terms approaches the golden ratio.
List•1 inputClick to open →
Generador de números romanos
Convierte un número entero en números romanos
A Roman numeral generator converts an ordinary number into the letter-based system the Romans used — I, V, X, L, C, D, and M. You still see Roman numerals on clock faces, in book chapters, on monuments, and in the names of kings, films, and sporting events, yet converting a number by hand means remembering the subtractive rules like IV for four and IX for nine.
Text•1 inputClick to open →
Conversor binario
Convierte un número en binario, octal y hexadecimal
A binary converter turns an ordinary decimal number into the number systems computers and programmers rely on: binary (base 2), octal (base 8), and hexadecimal (base 16). Computers store everything in binary, while hexadecimal gives a compact way to write those long strings of ones and zeros, so converting between bases is a daily task in programming, electronics, and digital design.
Text•1 inputClick to open →
Color hex a partir de número
Convierte un número en un código de color hex repetible
This tool turns any number into a hex colour code — the six-digit codes like #1A2B3C that browsers and design tools use. The same number always produces the same colour, so you get a stable, repeatable way to map IDs, seeds, or values onto colours.
Color•1 inputClick to open →
Calculadora de porcentajes
Calcula qué porcentaje es un número respecto de otro
A percentage calculator works out what percentage one number is of another — for example, that 25 is 12.5% of 200. Percentages come up constantly in everyday life, from working out discounts, tips, and tax to reading test scores, survey results, and statistics, yet the arithmetic is easy to fumble under pressure.
Text•2 inputsClick to open →
Simplificador de razones
Simplifica una razón entre dos números a su mínima expresión
A ratio simplifier reduces a ratio between two numbers to its lowest terms — turning 6 : 8 into 3 : 4, or 100 : 250 into 2 : 5. Ratios describe how quantities compare, and they show up in recipes, maps, model scales, aspect ratios, mixing instructions, and finance, but a ratio is only easy to read once it is simplified.
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Generador de muestras estadísticas
Crea una muestra de números aleatorios con estadísticas de resumen
A statistics sample generator builds a random set of numbers and works out the summary statistics that describe it — mean, median, mode, range, and standard deviation. Students, teachers, and analysts constantly need practice data to demonstrate how these measures behave, but typing out a fresh sample and computing each statistic by hand is slow and error-prone.
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Conversor de número a palabras
Escribe un número entero en palabras en inglés
A number to words converter writes a whole number out in plain English — turning 1234 into "one thousand two hundred thirty-four". Spelling numbers out is exactly what you do on cheques, in legal and financial documents, and in formal writing, where a written-out amount removes any doubt about the figure.
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Generador de cuadrado mágico
Construye un cuadrado mágico de orden impar donde filas y columnas coinciden
A magic square generator builds a grid of numbers where every row, every column, and both main diagonals add up to the same total, called the magic constant. These elegant puzzles have fascinated mathematicians and artists for centuries and still appear in recreational maths, classroom activities, and design.
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Generador de interés compuesto
Calcula cómo crece una inversión año tras año con interés compuesto
A compound interest generator shows how a starting amount grows over time when interest is reinvested rather than paid out. Enter your principal, the annual interest rate, how many years you plan to leave the money invested, and how often interest compounds, and it lists the balance at the end of each year plus the total interest earned.
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Generador de amortización de préstamos
Calcula la cuota mensual de un préstamo y una vista previa del cuadro de amortización
A loan amortization generator works out the fixed monthly payment on a loan and shows how each early payment splits between interest and principal. Enter the amount borrowed, the annual interest rate, and the term in years, and it returns the monthly payment, the total you will repay, the total interest, and a preview of the first few payments.
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Generador de práctica de conversión de unidades
Genera retos aleatorios de conversión de unidades con respuestas resueltas para practicar
A unit conversion practice generator creates random measurement challenges with worked answers, so you can drill the everyday conversions that trip people up. Pick a measurement type — length, mass, volume, or time — and how many problems you want, and it serves a fresh set each run, complete with the answer and the multiply-or-divide rule beside it.
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Conversor de temperatura
Convierte una temperatura entre Celsius, Fahrenheit y Kelvin
A temperature converter takes one reading and shows it in all three common scales at once — Celsius, Fahrenheit, and Kelvin. Enter a value, choose the scale it is currently in, and the tool converts it instantly so you do not have to remember the formulas.
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Generador de formato de moneda
Formatea un número como moneda en varias configuraciones regionales y símbolos principales
A currency format generator takes a plain number and shows how it is written as money in several major currencies and locales at once — US dollars, euros, British pounds, Japanese yen, Indian rupees, and Brazilian real. Each region has its own conventions for the symbol, the position of that symbol, the decimal mark, and the digit grouping, and getting them wrong looks unprofessional.
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Nombrador de números grandes
Nombra un número grande en palabras, desde mil hasta decillón
A large number namer translates an unwieldy figure into plain English, telling you roughly how many thousand, million, billion, or even decillion it represents. Big numbers are hard to grasp as a row of digits — is 1,234,567 closer to a million or a billion?
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Generador de curiosidades numéricas
Revela datos matemáticos sobre cualquier número entero que introduzcas
A number trivia generator reveals a handful of mathematical facts about any whole number you type, turning a plain figure into something curious. Enter a number and it tells you whether it is odd or even, whether it is prime, whether it is a perfect square, what its digits add up to, and how it looks in binary and hexadecimal.
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Generador de números ordinales
Convierte un número en su forma ordinal con el sufijo correcto
An ordinal number generator converts a plain number into its ordinal form — the version that shows position or rank, such as 1st, 2nd, 3rd, and 21st. Ordinals follow a small set of rules that catch people out: most numbers take "th", but those ending in one, two, or three usually take "st", "nd", or "rd", except for the teens, where eleven, twelve, and thirteen all take "th".
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Conversor de números romanos a arábigos
Convierte un número romano en un número arábigo estándar
A Roman to Arabic numeral converter turns a Roman numeral like MMXXVI into the everyday number 2026. Roman numerals combine seven letters — I, V, X, L, C, D, and M — using an additive system with a subtractive twist, where a smaller value before a larger one is subtracted, so IV is four and IX is nine.
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Generador de problemas de estadística
Genera problemas de práctica de estadística con respuestas resueltas
A statistics problem generator serves up practice questions on the core statistics every student meets first — mean, median, mode, range, variance, and basic probability — each paired with a worked answer. Choose how many problems you want and it returns a shuffled set you can use to revise, drill, or build a quiz.
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Generador de escenarios de probabilidad
Genera escenarios de práctica de probabilidad con soluciones resueltas
A probability scenario generator produces classic probability practice questions — dice, coins, cards, spinners, and drawing without replacement — each with a worked solution. Choose how many you want and it returns a shuffled set ideal for revision, drills, and quizzes.
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Generador de problemas de álgebra
Genera ecuaciones de álgebra lineal resolubles con sus soluciones
An algebra problem generator builds solvable linear equations of the form ax + b = c, each shown with its exact solution. Choose how many problems you want and it generates a fresh set every time, with whole-number answers so the focus stays on the method rather than messy arithmetic.
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Generador de datos de geometría
Revela datos, fórmulas y teoremas clave de geometría para estudiar
A geometry fact generator surfaces the key facts, formulas, and theorems that geometry is built on, drawn from well-established mathematics. Choose how many you want and it returns a shuffled set covering the essentials — angle sums, the Pythagorean theorem, areas of circles and triangles, polygon angles, and volumes — each stated clearly and concisely.
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Generador de conceptos de cálculo
Explica conceptos fundamentales de cálculo en definiciones claras y breves
A calculus concept generator delivers clear, bite-sized explanations of the core ideas in calculus, from limits and derivatives to integrals and the fundamental theorem. Choose how many you want and it returns a shuffled set of concept cards, each defining one idea in plain language with its geometric meaning where it helps.
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Conversor de bases numéricas
Convierte un número entre binario, octal, decimal y hexadecimal
A number base converter translates a number between the four bases that matter in computing and maths — binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) — showing all four at once. Enter a value, tell it which base the value is in, and it returns the equivalent in every base instantly.
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Generador de factoriales
Calcula el factorial exacto de un número entero usando enteros grandes
A factorial generator computes the exact factorial of a whole number — written n! — which is the product of every whole number from 1 up to n.
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Calculadora de combinaciones
Calcula combinaciones (n sobre r) con exactitud usando enteros grandes
A combination calculator works out how many ways you can choose r items from a set of n when the order does not matter — the quantity written C(n, r) or "n choose r". Enter the totals and it returns the exact count using big-integer arithmetic, so large values are precise rather than rounded.
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Calculadora de permutaciones
Calcula permutaciones (nPr) de forma exacta con enteros grandes
A permutation calculator works out how many ways you can arrange r items chosen from a set of n when the order matters — the quantity written P(n, r) or "n permute r". Enter the totals and it returns the exact count using big-integer arithmetic, so large values stay precise.
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Calculadora de desviación estándar
Calcula la media, la varianza y la desviación estándar de una lista de números
A standard deviation calculator takes a list of numbers and returns their mean, variance, and standard deviation — both the population and sample versions — so you can measure how spread out your data is. Paste comma-separated values and it computes everything at once.
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Calculadora de interés compuesto
Proyecta cómo crecen los ahorros con interés compuesto y aportaciones periódicas
A compound interest calculator shows how a starting balance plus regular monthly contributions grows over time once interest is added on top of interest. Enter your starting amount, monthly contribution, an annual interest rate, and a number of years, and it compounds the balance month by month to project the final total.
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Reparto del presupuesto mensual (50/30/20)
Reparte el salario neto mensual en necesidades, deseos y ahorro
A monthly budget split calculator divides your take-home pay into three buckets — needs, wants, and savings — using the popular 50/30/20 rule, or any percentages you prefer. Enter your monthly income and the share you want for each category, and it returns the exact dollar amount to assign to essentials like rent and groceries, to discretionary spending, and to savings or debt repayment.
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Planificador de objetivos de ahorro
Calcula el ahorro mensual necesario para alcanzar un objetivo en una fecha límite
A savings goal planner tells you exactly how much to set aside each month to hit a target by a chosen deadline. Enter the goal amount, what you have saved already, the number of months until your deadline, and an optional interest rate, and it calculates the monthly contribution required.
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Estimador de cuotas de préstamos
Estima la cuota mensual, el coste total y el interés de un préstamo
A loan payment estimator calculates the fixed monthly payment on a loan and shows what it will cost you in total. Enter the amount borrowed, the annual interest rate, and the term in years, and it uses the standard amortization formula to work out the level monthly payment, the total you will repay over the life of the loan, and how much of that is interest.
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Calculadora de propina y división de cuenta
Calcula la propina y divide una cuenta a partes iguales entre las personas
A tip and bill split calculator works out the tip on a restaurant bill and divides the total evenly between everyone at the table. Enter the bill amount, the tip percentage you want to leave, and how many people are splitting it, and it returns the tip in dollars, the grand total including tip, and the exact amount each person owes.
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Calculadora de cambio porcentual
Calcula el aumento o la disminución porcentual entre dos valores
A percentage change calculator tells you how much a value has gone up or down in percentage terms between an original and a new figure. Enter the starting value and the ending value, and it returns the absolute change in raw units plus the percentage increase or decrease, clearly labelled with the direction.
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Calculadora de ROI
Calcula el retorno de la inversión, el beneficio neto y el retorno anualizado
An ROI calculator measures return on investment — how much you gained or lost relative to what you put in. Enter the initial investment, the final value you received, and optionally the holding period in years, and it returns the net profit, the total return as a percentage, and an annualised return that lets you compare investments held for different lengths of time.
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Calculadora de unidades de punto de equilibrio
Halla cuántas unidades hay que vender para cubrir los costes fijos y variables
A break-even units calculator tells you how many units you must sell before a product starts making a profit. Enter your fixed costs, the price you charge per unit, and the variable cost to produce each unit, and it computes the contribution margin per unit, then divides your fixed costs by that margin to find the break-even quantity and the revenue it represents.
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Previsión de ingresos sencilla
Proyecta los ingresos a lo largo del tiempo a partir de una cifra inicial y una tasa de crecimiento
A simple revenue forecast projects how revenue grows month over month from a starting figure and a constant growth rate. Enter your current monthly revenue, an expected monthly growth percentage, and how many months ahead to look, and it compounds the growth to show the revenue at the start, the midpoint, and the end of the period, plus the cumulative total across all months.
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Calculadora de redondeo de moneda
Redondea una cantidad de dinero a la denominación de efectivo más cercana
A currency rounding calculator rounds a money amount to the nearest cash denomination, which is essential where the smallest coin is larger than one cent. Enter an amount and choose whether to round to the nearest five cents, ten cents, quarter, fifty cents, or whole unit, and it returns the rounded figure, the exact adjustment applied, and whether the customer ends up paying a little more or a little less.
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Calculadora de proporción áurea
Divide una longitud en la proporción áurea y muestra phi con alta precisión
A golden ratio calculator splits any length into the two parts that satisfy the famous proportion phi, roughly 1.618, where the whole is to the larger part as the larger part is to the smaller. Enter a total length and it returns phi to eight decimal places, the longer and shorter segments, and a check confirming their ratio equals phi.
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Generador de dígitos de pi
Muestra los dígitos de pi hasta un número elegido de decimales
A pi digits generator shows the value of pi to as many decimal places as you choose, up to one hundred. Enter the number of decimals and it returns pi truncated to that length, the run of digits after the decimal point on its own, and a count so you can confirm you got what you asked for.
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Calculadora de factorización en primos
Descompone un número entero en sus factores primos con exponentes
A prime factorization calculator breaks a whole number down into the prime numbers that multiply together to make it. Enter any integer of two or more and it finds the prime factors by trial division, then reports them in exponent form like two cubed times three squared times five, the fully expanded product, and a count of factors including repeats.
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Calculadora de mínimo común múltiplo
Halla el MCM de dos números usando el MCD euclidiano
A least common multiple calculator finds the smallest positive number that two whole numbers both divide into evenly. Enter two numbers and it computes their LCM using the reliable relationship that the LCM equals the product of the numbers divided by their greatest common divisor, where the divisor itself is found by the Euclidean algorithm.
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Calculadora de máximo común divisor
Halla el MCD de dos números con el algoritmo euclidiano
A greatest common divisor calculator finds the largest whole number that divides two numbers without leaving a remainder. Enter two numbers and it computes the GCD with the Euclidean algorithm, the classic method that repeatedly replaces the larger number with the remainder until nothing is left over.
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Calculadora de aritmética modular
Calcula un número módulo m y datos relacionados de la aritmética del reloj
A modular arithmetic calculator computes a number modulo a chosen modulus, giving the remainder that wraps around like the hours on a clock. Enter a value and a modulus and it returns the least non-negative remainder, the floor quotient with the division written out, the raw result of the percent operator, and the congruence statement.
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Generador de práctica con matrices
Genera una matriz aleatoria con sus dimensiones y propiedades clave
A matrix practice generator builds a random matrix of whatever size you choose, ready for linear algebra exercises. Set the number of rows and columns and the maximum element value, and it lays out a neatly aligned grid of integers, reports the dimensions and total element count, and notes whether the matrix is square, computing the main-diagonal trace when it is.
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Calculadora de componentes de vector
Calcula magnitud, ángulo y vector unitario a partir de las componentes x e y
A vector component calculator turns the x and y components of a two-dimensional vector into its magnitude, direction, and unit vector. Enter the horizontal and vertical components and it computes the length using the Pythagorean theorem, the direction angle measured from the positive x-axis in both degrees and radians, and the unit vector pointing the same way but scaled to length one.
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Calculadora de números complejos
Calcula el módulo, el argumento y el conjugado de un número complejo
A complex number calculator takes the real and imaginary parts of a complex number and returns its key properties. Enter the real part and the imaginary part and it gives the number in standard a plus bi form, its modulus or absolute value, its argument or angle in both degrees and radians, the complex conjugate, and the equivalent polar form.
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Calculadora de valores de trigonometría
Calcula el seno, el coseno y la tangente de un ángulo en grados
A trigonometry value calculator returns the sine, cosine, and tangent of any angle you enter in degrees. Type an angle and it converts to radians, computes the three core trigonometric ratios to six decimal places, normalises the angle into the standard zero to three hundred sixty degree range, and correctly reports tangent as undefined when the cosine is zero.
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Calculadora de logaritmos
Calcula logaritmos en cualquier base con valores natural y de base 10
A logarithm calculator finds the logarithm of a number in any base, along with the natural and common logarithms for reference. Enter a positive value and a base of two or more and it returns the logarithm in your chosen base using the change-of-base formula, the natural log to base e, and the base-ten common log, each to six decimals, plus a check that raising the base to the result recovers your value.
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Calculadora de crecimiento exponencial
Proyecta el crecimiento o decaimiento exponencial y el tiempo de duplicación
An exponential growth calculator projects how a quantity grows or shrinks when it changes by the same percentage each period. Enter a starting value, a growth rate per period, and a number of periods, and it compounds the change to give the final value, the total change, and either the doubling time for growth or the half-life for decay.
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Calculadora de sucesión geométrica
Construye una sucesión geométrica con su término n-ésimo y su suma
A geometric sequence calculator builds a sequence in which each term is the previous one multiplied by a fixed common ratio. Enter the first term, the common ratio, and how many terms you want, and it lists the sequence, restates the parameters, gives the formula for the nth term, computes that nth term directly, and sums the whole sequence using the geometric series formula.
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Calculadora de progresiones aritméticas
Construye una progresión aritmética con su término enésimo y su suma
An arithmetic sequence calculator builds a sequence in which each term differs from the last by a fixed common difference. Enter the first term, the common difference, and how many terms you want, and it lists the sequence, restates the parameters, gives the nth-term formula, computes that nth term directly, and totals the sequence with the arithmetic series formula.
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Calculadora de media ponderada
Calcula una media ponderada a partir de valores y sus pesos
A weighted average calculator finds the mean of a set of values when each value counts for a different amount. Enter your values and a matching list of weights, both comma separated, and it multiplies each value by its weight, divides by the total weight, and reports the weighted average alongside the plain unweighted average for comparison and the sum of the weights.
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Calculadora de puntuación Z
Calcula la puntuación Z de un valor dada la media y la desviación estándar
A z-score calculator tells you how far a value sits from the mean, measured in standard deviations. Enter the value, the mean of the distribution, and the standard deviation, and it computes the z-score as the value minus the mean divided by the standard deviation, states how many standard deviations above or below the mean the value lies, estimates the percentile under a normal distribution, and flags whether the value is unusual.
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Calculadora de percentiles
Halla el rango percentil de un valor dentro de un conjunto de datos
A percentile calculator finds where a value ranks within a data set, expressed as the percentage of values at or below it. Enter your data as a comma-separated list and the value you want to rank, and it sorts the data, counts how many values fall below and equal to your value, and computes the percentile rank, alongside the data set size and its minimum, median, and maximum for context.
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Prompt de estudio de intervalos de confianza
Construye un ejemplo resuelto de intervalo de confianza y prompt de estudio
A confidence interval study prompt builds a fully worked example that shows how to construct a confidence interval for a population mean, step by step. Enter a sample mean, a standard deviation, a sample size, and a confidence level, and it lays out the standard error, the critical z value for your level, the margin of error, and the final interval, then explains what the interval really means and sets a follow-up task.
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Prompt de estudio de contraste de hipótesis
Construye un ejemplo resuelto de prueba z de una muestra y un prompt de estudio
A hypothesis test study prompt walks through a one-sample z-test from start to finish, showing how to decide whether a sample mean differs significantly from a hypothesised value. Enter the sample mean, the hypothesised population mean, the standard deviation, and the sample size, and it states the null and alternative hypotheses, computes the standard error and the z test statistic, approximates the two-tailed p-value, and reaches a decision at the conventional five percent significance level, with a plain-language interpretation.
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Propuesta de estudio del teorema de Bayes
Construye un ejemplo resuelto del teorema de Bayes que actualiza una probabilidad previa con evidencia
A Bayes theorem study prompt builds a worked example of how to update a prior probability with new evidence, using the classic medical-test scenario. Enter the prior probability of a condition, the test’s true positive rate, and its false positive rate, and it computes the total probability of a positive result and then the posterior probability that someone actually has the condition given a positive test, showing every step of Bayes’ rule.
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Number Fact Generator
Generates fascinating, accurate facts about numbers and mathematics
A number fact generator serves up fascinating, accurate facts about numbers and the mathematics behind them, from the curious to the genuinely mind-bending. Choose how many you want and it returns a shuffled set — zero cannot be written in Roman numerals, a googol exceeds the atoms in the universe, there are infinitely many primes.
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Mental Math Trick Generator
Generates handy mental math tricks for faster calculation in your head
A mental math trick generator hands you shortcuts for calculating in your head faster, the small techniques that make numbers feel easy. Choose how many you want and it returns a shuffled set — multiply by 9 by going via 10, square any number ending in 5 instantly, find 15% by stacking 10% and half of it.
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Dice Notation Generator
Generates tabletop dice notation like 2d6+3 with what each roll means
A dice notation generator hands you tabletop dice expressions like 2d6+3, each explained so you know exactly what to roll and what range to expect. Choose how many you want and it returns a shuffled set — the classic 1d20 check, 3d6 stat rolls, 4d6-drop-lowest for character creation, advantage as 2d20-keep-highest.
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Large Number Name Generator
Generates the names of large numbers from thousand up to a googol
A large number name generator gives you the names of big numbers from a humble thousand all the way up to a googol and beyond, each with its value as a power of ten. Choose how many you want and it returns a shuffled set — million, billion, trillion, then the less familiar quintillion, octillion, and decillion, ending at the famously enormous googol and googolplex.
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Math Symbol Meaning Generator
Generates math symbols paired with their name and meaning
A math symbol meaning generator pairs mathematical symbols with their name and a plain-English meaning, so the cryptic marks in a formula finally make sense. Choose how many you want and it returns a shuffled set — the summation sigma, the square-root radical, pi, infinity, the integral sign, factorial.
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Math Constant Fact Generator
Generates facts about famous mathematical constants like pi and e
A math constant fact generator serves up facts about the famous constants of mathematics — pi, e, the golden ratio, and more — that turn up everywhere from circles to compound interest. Choose how many you want and it returns a shuffled set: pi never repeats, e is the base of natural logarithms and governs continuous growth, the golden ratio is the limit of Fibonacci ratios, Euler's identity ties five constants together in one line.
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Statistics Term Explainer
Generates statistics terms with clear, plain-language explanations
A statistics term explainer pairs the core terms of statistics with clear, plain-language definitions, so the words behind the numbers finally click. Choose how many you want and it returns a shuffled set — mean, median, and mode; standard deviation and variance; correlation, p-value, and confidence interval.
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Unit Conversion Reference
Generates common unit conversions with their exact or rounded factors
A unit conversion reference generator gives you common conversions between metric and imperial units, each with its exact or rounded factor, so you can convert without hunting through a search engine. Choose how many you want and it returns a shuffled set — inches to centimetres, miles to kilometres, kilograms to pounds, Celsius to Fahrenheit.
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Geometry Formula Reference
Generates essential geometry formulas for area, perimeter, and volume
A geometry formula reference generator gives you the essential formulas for area, perimeter, and volume, each written in plain words so you can apply it straight away. Choose how many you want and it returns a shuffled set — the area of a circle, the volume of a cylinder, Pythagoras's theorem, the sum of a polygon's angles.
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Number Superstition Generator
Generates number superstitions and their meanings from around the world
A number superstition generator serves up beliefs about lucky and unlucky numbers from cultures around the world, along with the reasons behind them. Choose how many you want and it returns a shuffled set — why 13 is skipped in Western buildings, why 4 is avoided across East Asia, why 8 is prized in China, why Italy fears 17.
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Frequently Asked Questions
What is the difference between a random number generator and a secure random number generator?
A basic random number generator uses a pseudo-random algorithm seeded by something like the current time, which is fine for games, sampling, or education. A secure random number generator draws from a cryptographically strong source (like the browser's crypto API), making outputs unpredictable enough for passwords, tokens, and keys. For anything security-related, always use a generator explicitly described as cryptographically secure.
Are the fake credit card numbers generated here usable for real purchases?
No. The Fake Credit Card Number Generator produces numbers that pass the Luhn algorithm check — the same structural validation a payment form uses — but they have no associated account, bank, or funds. They're designed specifically for testing payment forms and checkout flows during development, where you need a number that won't be rejected as obviously malformed but also won't process a real transaction.
How do I generate a list of unique random numbers with no duplicates?
Use the Random Number Set Generator or the Random Numbers Without Repetition Generator. Both let you set a min/max range and how many numbers you want, then guarantee no value appears twice. This is useful for lottery draws, random sampling in research, or assigning unique IDs without a database check. If you need the output as a CSV, the Random Number Table CSV Generator covers that too.
What's the best generator for creating test data for a banking or finance application?
It depends on what you're testing. The Random IBAN Test Number Generator produces structurally valid IBANs, the Fake Bank Account Number Generator covers UK sort codes and account numbers, and the Fake ABA Routing Number Generator handles US bank routing numbers. For card testing, the Test Credit Card Number Generator gives Luhn-valid numbers across major card schemes. Use each one for its specific field rather than adapting a generic number generator.
Can I generate random numbers following a normal (bell curve) distribution instead of a uniform one?
Yes — the Random Gaussian Number Generator lets you set a mean and standard deviation, then generates numbers clustered around that mean with natural falloff toward the edges. This is useful for simulating realistic data like test scores, measurement errors, or user behaviour patterns. There's also a batch version if you need a full dataset at once.
Which generator should I use to create invite or referral codes for an app?
The Invite Code Generator is the most direct option — it produces short, human-readable codes suited for sharing. If you need codes without visually confusing characters (like 0 and O, or 1 and l), the Ambiguous-Free Code Generator is worth using instead. For bulk production of voucher or coupon codes, the Coupon Code Generator or Alphanumeric Code Generator both support batch output with configurable length and format.