Luhn / PAN Validator

Validate a credit or debit card number with the Luhn checksum, identify the scheme (Visa, Mastercard, Amex, Discover, JCB, UnionPay), and generate a display-safe mask.

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Luhn / PAN Validator — The Luhn algorithm (a simple modulo-10 checksum) is what catches typos in card numbers before they hit the payment processor. Every well-formed card number passes it; a single mistyped digit fails.

Validation runs entirely in your browser. Your card number is never sent to a server, logged, or stored.

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Qu’est-ce que Luhn / PAN Validator ?

The Luhn algorithm (a simple modulo-10 checksum) is what catches typos in card numbers before they hit the payment processor. Every well-formed card number passes it; a single mistyped digit fails.

This tool validates the Luhn checksum, identifies the card scheme from the Issuer Identification Number (the first 6 digits), checks the length against what each scheme allows, and produces a display-safe mask for receipts and logs. Everything runs in your browser — no upload, no third-party API.

Comment l’utiliser

Paste or type a card number

Dashes and spaces are fine; they are stripped before validation.
Read the verdict

A green badge means it passes both the Luhn checksum and the length check for the detected scheme.
Copy the masked display

Use the BIN •••• last 4 mask for any UI that shows the card back to a user.

Questions fréquentes

Is this safe to use with real card numbers?

Does a passing Luhn check mean the card is real?

Why does it identify the card scheme?

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Last reviewed: 2026-09-25