Credit Card Validator

The Luhn algorithm is a checksum most payment networks append to a card number to catch accidental typing errors (one transposed or mistyped digit). This tool checks a number against Luhn and identifies the payment network from its prefix (BIN).

How to use it

• Enter a card number — the Luhn check and network detection happen instantly as you type.
• Spaces and hyphens in the number are ignored automatically, so you don't need to strip them yourself.
• The tool shows the expected length for the detected network, so you can immediately see if digits are missing.

Common uses

• Validating a payment form on the frontend before submission — a basic sanity check before hitting the payment gateway.
• Generating test card numbers for development and QA (with a correct checksum, but not tied to real accounts).
• Quickly checking whether a manually entered number is just a typo-riddled string of random digits.

Things to keep in mind

A card passing the Luhn check doesn't mean it's active, unblocked, or even real — the check only catches obvious typing mistakes.

Card data is processed entirely in your browser and never sent anywhere, but for actual payments, always use a certified payment form (PCI DSS) rather than pasting a real card number into a third-party tool.