Credit Card Validator
Validate credit card numbers using the Luhn algorithm. Detect card type (Visa, Mastercard, Amex, Discover). Free, instant, no data stored.
Enter a card number above to validate
We check format, length, Luhn checksum, and card type
What we check
Format Check
Checking for valid numeric characters
Length Verification
Verifying card number length (13-19 digits)
Luhn Algorithm
Running Luhn checksum verification
Card Type Detection
Identifying card network from BIN pattern
Learn More
Learn how credit card validation works, including the Luhn algorithm, BIN ranges, and card type detection.
What Is Credit Card Validation?
Credit card validation is the process of checking whether a card number is structurally valid before attempting a transaction. This includes verifying the number format, applying the Luhn checksum algorithm, and detecting the card network (Visa, Mastercard, Amex, etc.) based on the first digits.