Credit Card Validator

Validate credit card numbers using the Luhn algorithm. Get instant verification results.

How Card Validation Works

Our validator uses the Luhn algorithm, the industry-standard method for checking if a credit card number is mathematically valid. This algorithm validates the checksum digit to ensure the card number follows the proper format required by payment networks.

The Luhn algorithm was developed by IBM scientist Hans Peter Luhn and is used globally to prevent simple data entry errors and detect fraudulent card numbers. All processing happens locally in your browser for maximum security.

Key Features

Industry Standard

Uses the same Luhn algorithm employed by payment processors worldwide.

Instant Results

Get validation results immediately with clear visual feedback.

100% Private

All validation happens in your browser. No data is ever transmitted or stored.

Free Forever

Unlimited validations at no cost. No registration or subscriptions required.

Frequently Asked Questions

The Luhn algorithm is a checksum formula used to validate credit card numbers. It performs a series of calculations on the digits to verify that the number follows the correct pattern. While a valid Luhn check doesn't mean the card is active or has funds, it confirms the number structure is mathematically correct.
Yes, completely safe. Our validator runs entirely in your browser using JavaScript. Your card number never leaves your device or gets sent to any server. We don't collect, store, or transmit any data you enter.
No. Luhn validation only checks if the card number structure is mathematically valid. It doesn't verify if the card is active, has available credit, or belongs to a real account. Only the issuing bank can confirm card status.
Our validator works with all major card types including Visa, Mastercard, American Express, Discover, Diners Club, and JCB. The Luhn algorithm is universal and applies to all standard credit and debit cards.

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