Credit Card Validator
Validate credit card numbers using Luhn algorithm and identify card types
Card Information
Enter a credit card number to validate its format and authenticity
Enter numbers only - spaces will be added automatically
How Credit Card Validation Works
Validation Steps
- • Length Check: Verifies correct number of digits
- • Prefix Check: Identifies card type and issuer
- • Luhn Algorithm: Mathematical validation formula
Supported Card Types
- • Visa (16 digits, starts with 4)
- • Mastercard (16 digits, starts with 5)
- • American Express (15 digits, starts with 3)
- • Discover (16 digits, starts with 6)
- • JCB (16 digits, starts with 35)
Security Note:
This tool only validates card number format. It does not verify if the card is active, has sufficient funds, or belongs to you. Never share your actual credit card details.