Credit Card Number Generator

Generate Luhn-valid test credit card numbers for development and testing. Numbers pass the Luhn checksum algorithm but are not real cards and cannot be used for actual purchases.

These numbers are generated for testing and development purposes only. They pass the Luhn algorithm check but are not associated with real accounts and cannot process real transactions.

VISA Visa MC Mastercard AMEX Amex DISC Discover DINE Diners JCB JCB

Quantity (1–100)

Format

Spaced 4444 4444 4444 4444 Plain 4444444444444444

Select a network and click Generate

About the Credit Card Number Generator

This tool generates syntactically valid credit card numbers for use in software development, testing payment form validation, and QA testing. All numbers pass the Luhn algorithm (also called mod 10) check — the same checksum used by real card networks — but they are not associated with real accounts and will be declined by any actual payment processor.

Supported networks

Visa — 16 digits, starts with 4
Mastercard — 16 digits, starts with 51–55 or 2221–2720
American Express — 15 digits, starts with 34 or 37
Discover — 16 digits, starts with 6011, 622126–622925, 644–649, or 65
Diners Club — 14 digits, starts with 300–305, 36, or 38
JCB — 16 digits, starts with 3528–3589

What is the Luhn algorithm?

The Luhn algorithm is a simple checksum formula used to validate credit card numbers, IMEI numbers, and other identification numbers. It works by doubling every second digit from the right, summing all digits, and checking that the total is divisible by 10. Most payment forms use this check as a first pass to catch typos before sending a request to the payment processor.

Important notice

These numbers are for testing and development only. Using fake card numbers to attempt real transactions is illegal. Always use your payment processor's official test card numbers (such as Stripe's 4242 4242 4242 4242) for integration testing in sandbox environments.