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Random Alphanumeric Code Generator

Used by developers, writers, and creators worldwide.

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. Set a group size of 4 with a hyphen separator and you get the classic XXXX-XXXX-XXXX-XXXX license key pattern instantly. Character set choice matters more than most people expect. Uppercase-plus-digits drops ambiguous characters like O and 0, making codes easier to type from printed vouchers. Lowercase formats suit case-sensitive URL tokens. Digits-only mode produces numeric PINs. Generate up to 100 codes per run and paste the batch straight into a CSV or database seed file.

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How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Set the count field to how many codes you need, up to 100 per run.
  2. Choose a code length — 8 for vouchers, 16 for license keys, 6 for PINs.
  3. Select a character set from the format dropdown that matches your use case.
  4. Optionally enter a group size and separator to format codes into readable blocks.
  5. Click Generate, then copy the full list and paste it into your spreadsheet, database, or admin tool.

Use Cases

  • •Generating XXXX-XXXX-XXXX-XXXX license keys for a software distribution batch
  • •Creating 8-character referral codes for a SaaS onboarding campaign in Notion or a CRM
  • •Seeding a Postgres staging database with unique registration tokens for 100 beta users
  • •Producing digits-only 6-digit OTPs for testing a two-factor authentication flow
  • •Generating URL-safe lowercase tokens for password-reset links in a Next.js app

Tips

  • →Use uppercase + digits and group size 4 with a hyphen to produce license key codes that users can transcribe without misreading O as 0.
  • →For URL tokens, pick lowercase + digits and no grouping — lowercase keeps links tidy and avoids case-sensitivity issues in some web frameworks.
  • →Generate a batch of 50 promo codes at once, then import them directly into Shopify or WooCommerce's bulk code upload field to save manual entry time.
  • →If you're using codes as order or ticket IDs, prefix them with a letter manually (e.g., 'ORD-' before the code) so IDs never start with a digit, which can break some database ID fields.
  • →For test data seeding, generate 100 codes at length 12 with mixed case and paste them straight into a SQL INSERT script or CSV fixture file.
  • →Avoid group sizes that don't divide evenly into your total length — a 10-character code with group size 4 produces an uneven last block that looks like a formatting error.

FAQ

how do I generate license key format codes like XXXX-XXXX-XXXX-XXXX

Set the code length to 16, enter 4 in the group size field, and type a hyphen as the separator. The generator splits each code into four groups of four. Choose uppercase + digits to avoid visually ambiguous characters like O and 0.

are the generated codes guaranteed unique

Each code is generated independently at random. For length-8 alphanumeric codes, the chance of a collision in a 100-code batch is negligibly small, but not mathematically zero. If uniqueness is critical, store the codes in a database and check for duplicates before assigning them.

is this tool safe for generating real API keys or production tokens

It uses browser-based randomness, which is fine for promo codes, test data, and non-security-critical tokens. For production secrets — session tokens, API keys, password-reset links — use a server-side CSPRNG instead, such as Node's crypto.randomBytes or Python's secrets module.