Credit Card Validator
Run a Luhn check on a card number and guess its brand from the prefix, as a format check only.
Quick answer: enter your details below and click Validate — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Developer
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How to use
- Type the card number; spaces and dashes are ignored.
- Click Validate.
- Read the Luhn result and the detected brand, remembering it is format only.
About this tool
Type a card number and this tool runs the Luhn checksum and identifies the likely brand from its starting digits, covering Visa, Mastercard, American Express and Discover. This is a format check only: it never shows whether a card is real, active, or belongs to anyone, and nothing you type is stored or sent anywhere. Never enter a real card number into a page you do not trust.
Frequently asked questions
Does a passing Luhn check mean the card is real?
No. Luhn only checks that the digits fit the checksum pattern, which any well-formed test number also does.
Is my card number stored?
No. The check runs in your browser and nothing is uploaded or kept.