Credit Card Validator

Validate any payment card number with the Luhn algorithm and detect the brand (Visa / Mastercard / Amex / Discover / etc). Browser-only — never sent over the network.

100% in your browser. Files never uploaded.

Card number

Spaces and dashes are ignored. Nothing leaves your browser.

Passes Luhn check

16 digits · brand: Visa

Luhn passes confirm the number is well-formed but not that the card exists or is funded — that requires a real authorization.

How to use

1
Type or paste a card number
Spaces and dashes are stripped automatically.
2
Read the result
Luhn pass/fail and detected brand.

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