Credit Card Validator
Validate a credit card number's Luhn checksum and detect its scheme. Nothing is sent to a server — the check runs entirely in your browser.
Enter a value above to validate it instantly.
Every major credit card number embeds a check digit computed with the Luhn algorithm (also called the mod-10 algorithm). This tool runs that check: it confirms whether a number is mathematically well-formed and tells you which network issued it based on the leading digits (the BIN/IIN).
A passing Luhn check does NOT mean a card is real, active, or has funds — it only means the number is structurally valid. That is exactly why it is useful for testing payment forms: you can verify your validation logic without ever touching a real card.
This is the same checksum used by the identity generator on this site, so any card number it produces will validate here as the correct scheme while remaining a non-chargeable sandbox test number.
Frequently asked questions
Does a valid Luhn check mean the card works?+
No. The Luhn check only confirms the number is structurally valid. It says nothing about whether the card exists, is active, or has available credit.
Is my card number sent anywhere?+
No. The validation runs entirely in your browser with JavaScript. Nothing is transmitted or stored.