Credit Card Validator

Check if a CC number passes the Luhn check algorithm.

* This tool only checks mathematical validity. It does not check if the card is active or has funds.

What is the Luhn Algorithm?

The Luhn algorithm, also known as the "modulus 10" or "mod 10" algorithm, is a simple checksum formula used to validate a variety of identification numbers, such as credit card numbers and IMEI numbers. It was designed to protect against accidental errors, such as a mistyped digit. Note: We process this locally, ensuring your card data is perfectly safe and never transmitted.

Is it safe and private?

Yes, absolutely. All processing is done locally within your web browser using JavaScript. Your data is never transmitted to or stored on our servers, ensuring 100% privacy and security.