Credit Card Generator (Test Only)

This tool generates credit card numbers that satisfy the Luhn (mod-10) check for Visa, Mastercard, American Express, Discover, and JCB. It produces random but structurally correct numbers — including the right length, IIN (issuer identification number) prefix, and a correctly-calculated Luhn check digit — alongside a matching random expiry, CVV and cardholder name.

TEST ONLY — READ THIS

These numbers are NOT real credit cards. They are not linked to any bank, account, or payment processor. They exist solely for development and QA. Attempting to use a generated number for a real transaction will fail and may be fraud.

Using any credit card number you did not receive from a real issuer to purchase goods, services, or subscriptions is illegal in most jurisdictions. Don't.

What it's actually useful for

• Client-side form validation — build and test UI that checks card length and Luhn.
• Design mockups — show realistic-looking card numbers in screenshots without exposing real card data.
• Unit & integration tests — seed test databases with valid-shape card numbers.
• Teaching materials — demonstrate the Luhn algorithm with real-looking data.
• Payment gateway sandboxes — some sandboxes accept Luhn-valid numbers for smoke tests (many also require specific documented test numbers — check your provider).

How the generation works

1. A brand-specific IIN prefix is chosen (e.g. 4 for Visa, 51–55 or 2221–2720 for Mastercard, 34/37 for Amex, 6011/65 for Discover, 3528–3589 for JCB).
2. Random body digits are appended up to total length − 1.
3. The Luhn check digit is computed and appended.
4. Output is formatted with brand-appropriate spacing (4-4-4-4 for most brands, 4-6-5 for Amex).

Brands & lengths

Again: use these numbers only in development environments. Never attempt a real purchase with a generated card.