Credit Card Validator

Validate credit card numbers and identify card types using the Luhn algorithm

Card Number Input

Credit Card Number:

Enter numbers only or with spaces/dashes

Batch Validation

Card Numbers (one per line):

Supported Card Types

Visa
Starts with 4, 13-19 digits

Mastercard
Starts with 5, 16 digits

American Express
Starts with 34/37, 15 digits

Discover
Starts with 6, 16 digits

JCB
Starts with 35, 16 digits

Luhn Algorithm

The Luhn algorithm validates card numbers:

Starting from the right, double every second digit
If doubling results in a two-digit number, add the digits
Sum all digits
If the total is divisible by 10, the number is valid

Security Notice

Important: This tool only validates card number format and checksum. It does not verify if the card is active, has sufficient funds, or belongs to you.

No data is stored or transmitted
All validation is done locally
Never enter real card details online

Test Card Numbers

Valid Test Numbers:
4532123456789012 (Visa)
5555555555554444 (Mastercard)
378282246310005 (Amex)
6011111111111117 (Discover)

Invalid Test Numbers:
4532123456789013
1234567890123456