How does batch credit card validation work?

Enter multiple card numbers (one per line) and the validator checks each using the Luhn algorithm. It identifies the card type, verifies length, and splits results into valid and invalid cards.

What is the Luhn algorithm?

The Luhn algorithm is a simple checksum formula used to validate identification numbers. It works by summing digits with every second digit doubled, then checking if the total is divisible by 10.

Which card types are supported?

The validator supports 20+ card types including Visa, Mastercard, American Express, Discover, Diners Club, JCB, UnionPay, RuPay, Mir, Elo, Hipercard, Maestro, and more.

Is it safe to enter my card numbers?

All processing happens locally in your browser. No data is sent to any server. However, we recommend using test numbers only for security.

Credit Card Validator

Batch validate multiple credit card numbers at once. Identify card type, check Luhn algorithm, and verify format for Visa, Mastercard, Amex and 20+ card types.

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