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Fake Credit Card Number Generator

Used by developers, writers, and creators worldwide.

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. This tool generates syntactically correct card numbers for Visa, Mastercard, American Express, and Discover — numbers that look and behave like real ones in every technical sense except they carry no financial weight. The numbers are purely fictional. They satisfy the Luhn checksum and follow the correct IIN prefix and digit-length rules for each network, but are not tied to any bank or account. Generate up to a full batch at once and paste them straight into your staging environment, fixture file, or Postman collection.

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How to use

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

Detailed instructions

  1. Select the card brand you need from the dropdown (Visa, Mastercard, American Express, or Discover).
  2. Set the count field to the number of card numbers you want generated in one batch.
  3. Click Generate to produce Luhn-valid card numbers matching your selected brand and quantity.
  4. Copy the output numbers and paste them into your test form, fixture file, or QA test case.
  5. Combine each number with a future expiry date and any valid-format CVV to build a complete test payload.

Use Cases

  • •Seeding a Postgres fixture file with one card number per supported brand
  • •Validating front-end Luhn-check logic in a Stripe.js or Braintree integration before connecting a live gateway
  • •Running parameterized Cypress checkout tests across Visa, Mastercard, Amex, and Discover card flows
  • •Testing card-type detection UI that swaps network logos when the user types a recognisable IIN prefix
  • •Building a QA test plan that requires one valid card number per supported payment network

Tips

  • →Generate one number per supported brand in a single session to cover multi-card-type UI tests in one pass.
  • →When testing card-type icon switching, generate an Amex number and verify your form detects the 15-digit length correctly — Amex's shorter format catches layout bugs Visa testing misses.
  • →Save a small fixture file of 10-20 generated numbers per brand so your automated test suite does not depend on live generation during CI runs.
  • →Stripe and PayPal sandbox modes whitelist specific test numbers; use this generator for Luhn validation unit tests and the gateway's own docs for end-to-end transaction tests.
  • →If your form masks input (e.g., 4111 •••• •••• ••••), generate a batch and manually enter several numbers to confirm the masking logic handles all supported prefix lengths correctly.
  • →American Express numbers are 15 digits, not 16 — if your input field enforces a 16-digit maximum, generating an Amex number here will immediately expose that validation bug.

FAQ

can i use these fake credit card numbers in stripe or braintree sandbox

Not directly. Stripe and Braintree maintain their own whitelists of accepted test card numbers and reject all others in sandbox mode. Use the numbers here for front-end Luhn validation testing; for full end-to-end gateway testing, grab the official test cards from your gateway's documentation.

is generating fake credit card numbers illegal

Generating Luhn-valid numbers purely for software testing is legal and a standard industry practice. It becomes illegal only when numbers are used to deceive, commit fraud, or attempt unauthorized transactions. This tool is intended exclusively for developers and testers working in non-production environments.

what's the difference between a luhn-valid number and a real credit card number

A Luhn-valid number passes the checksum formula that payment forms use to catch typos, but it has no issuing bank, cardholder, or credit line behind it. Real card numbers also pass Luhn but are registered with a bank — any live processor will decline a fictional number at the authorization step even if the checksum is correct.