Credit Card Validator
Validate a card number with Luhn check and detect its network — all in your browser, nothing is stored.
For testing and validation only. Do not enter real card numbers on untrusted sites.
Credit card number validation
This tool checks whether a card number passes the Luhn algorithm — a standard checksum used to detect typos. It also identifies the card network (Visa, Mastercard, Amex, Discover) from the first digits (IIN/BIN).
Luhn validation alone does not guarantee a card is real or active. It only confirms the number is structurally plausible.
FAQ
Is my card number stored? No — validation runs entirely in your browser. The number is never sent to any server.
What is the Luhn algorithm? It’s a simple checksum formula used to validate identification numbers. A digit error in any single position makes the Luhn check fail.
Can this tool tell me if a card is active? No — it only checks the number’s mathematical validity. Only your bank can confirm whether a card is active.