Developer's DescriptionBy Soft911Check the validity of your credit card number using LUHN formula.Credit Card Number Validator is a free utility to help you check validity of a credit card number. Credit Card Number Validator verifies credit card numbers right on your PC without going on-line or transmitting sensitive information from your PC. Credit Card Number Validator uses LUHN formula (Mod 10) for validation of primary account number. The tool can only validates the integrity of the number combination, not the credit card itself.