Credit Card Number Checker

Check whether a card number is correctly formed with the Luhn algorithm and identify the card type. The number stays on your device.

Tip from Tink: This catches typos; it can't tell if a card is real or active.

Card number

Valid number format?

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Card type

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Digits

This only checks the Luhn checksum that catches typos. It can't tell whether a card is real, active or has money on it. Test numbers like 4111 1111 1111 1111 are fine to use.

🔒 Runs entirely on your device. Nothing you type is sent anywhere or saved.

How to use the Credit Card Number Checker

Type the card number.
See whether it passes and the card type.

Everything runs in your browser. Nothing you enter is uploaded.