Validador de Tarjeta de Crédito
Validar números de tarjeta de crédito usando el algoritmo Luhn
Credit Card Validator
Validate credit card numbers using Luhn algorithm
Enter card number with or without spaces
About Credit Card Validation
This tool validates credit card numbers using the Luhn algorithm (mod-10 algorithm). It checks if the card number is mathematically valid and identifies the card type.
Luhn Algorithm
The Luhn algorithm is a checksum formula used to validate identification numbers such as credit card numbers. It detects accidental errors in number entry.
Supported Card Types
- Visa: Starts with 4, 16 digits
- Mastercard: Starts with 51-55 or 2221-2720, 16 digits
- American Express: Starts with 34 or 37, 15 digits
- Discover: Starts with 6011 or 65, 16 digits
- Diners Club: Starts with 36 or 38, 14 digits
Security Note: This tool only validates the format and checksum. Never share real credit card information online.