Skip to main content
Back to Dev generators

Dev

Fake Credit Card Generator

Used by developers, writers, and creators worldwide.

A fake credit card generator creates structurally valid card numbers that pass the Luhn algorithm check without being tied to any real bank account. Developers and QA engineers use these to test payment forms, e-commerce checkouts, and billing APIs in sandbox environments where real card data must never appear. Each number follows the correct IIN prefix and digit length for its network — 15 digits for Amex, 16 for Visa, Mastercard, and Discover. Generate up to several cards at once, choose a specific network or leave it on Random, and get a complete number ready to paste into your test suite or UI in seconds. No signup, no risk.

Loading usage…

Free forever — no account required

How to use

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

Detailed instructions

  1. Set the count input to the number of card numbers you need for your test session.
  2. Choose a specific card network from the dropdown, or leave it on Random to get a mixed set across networks.
  3. Click Generate to produce complete card entries, each including a card number, expiry date, and CVV.
  4. Copy individual card details directly into your payment form fields or test script variables.
  5. Re-generate as often as needed to get fresh numbers for each test run or test case.

Use Cases

  • •Populating Stripe or Braintree sandbox checkout forms during integration testing
  • •Verifying that a React checkout UI swaps card logos correctly per network
  • •Testing Amex's 4-6-5 digit input mask against a custom Cleave.js formatter
  • •Seeding a Postgres staging database with realistic-looking card records via Faker scripts
  • •Validating a server-side Luhn algorithm implementation in a Jest unit test suite

Tips

  • →Use the Random network setting when seeding a database so you get natural variation across Visa, Mastercard, Amex, and Discover.
  • →Test Amex separately by selecting it explicitly — its 15-digit length and 4-digit CVV often expose UI bugs that 16-digit cards miss.
  • →Generate a fresh batch for each automated test run to avoid false passes caused by cached validation state in your app.
  • →Pair these numbers with your gateway's sandbox mode, not production — some gateways have specific approved test card numbers that must be used for gateway-level tests.
  • →If your form has a card logo switcher, generate one card per network and verify each logo renders correctly before running full regression tests.
  • →Store a small set of generated numbers in your test fixtures file so your team shares consistent test data across local and CI environments.

FAQ

can fake credit card numbers be used to make a real purchase

No. Every real payment gateway contacts the card network and issuing bank to authorize a transaction, and a fabricated number has no issuer record — it fails at that step. These numbers are only useful for testing your own validation logic and UI behavior, not for bypassing any real payment system.

what is the luhn algorithm and why does it matter for payment form testing

The Luhn algorithm is a checksum formula that checks whether a card number's digits are internally consistent. Most payment libraries and server-side validators run this check before contacting a processor, so fake numbers that pass Luhn let you test those layers realistically. Numbers that fail Luhn get rejected immediately, which would hide bugs in your downstream logic.

why does my payment gateway reject these fake card numbers even though they look valid

These numbers pass front-end format and Luhn checks but have no record in any card network database, so live gateways decline them at the authorization step. For gateway-level testing, use your provider's official test cards — such as Stripe's 4242 4242 4242 4242. Use this generator specifically for UI validation, input masking, and your own server-side Luhn logic.