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Test Card Generator

Generate Luhn valid test card numbers by brand using the correct prefixes and check digits.

Generate test card numbers

Numbers: 0 · Luhn check: passed
Test data only. These numbers pass the Luhn check but are not real payment cards and cannot be charged.

How to use the Test Card Generator

  1. Pick the card brand you need, or choose any brand for a mix.
  2. Set how many numbers to generate and whether to group the digits.
  3. Copy the test numbers, and check that every row passes the Luhn check.

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Frequently Asked Questions

Common questions about the free online test card generator.

It is a made up card number that passes the Luhn checksum and prefix rules for a brand, used only in sandbox payment testing.
No. They are random test data with no linked account, so they are rejected by real payment networks and cannot take any money.
Every digit except the last is doubled from the right, digits over nine are reduced by nine, and the final digit makes the total a multiple of ten.
Visa, Mastercard, American Express, Discover, JCB and Diners Club, each with the correct number length and starting prefixes.
American Express uses fifteen digits and Diners Club uses fourteen, while Visa, Mastercard, Discover and JCB use sixteen digits.
They are generated from your browser crypto random source, so repeats are extremely unlikely, though you can regenerate any time.
Yes. Copy the list into fixtures, and keep in mind that sandbox gateways usually also require a test expiry date and CVV.
No. The numbers are created locally with the browser crypto API, so nothing is transmitted or stored anywhere.
Never. They are test data only and would be declined by any real processor and may breach the terms of your gateway.
Yes. It is completely free with no account, no sign-up and no limit on how many test numbers you create.

Last updated: October 10, 2026