Card Type
Generation Options
Generated Cards
Card Validator
Luhn Algorithm
What is the Luhn Algorithm?
A simple checksum formula used to validate a variety of identification numbers, especially credit card numbers.
How it works:
- Starting from the right, double every second digit
- If doubling results in a two-digit number, add the digits together
- Sum all digits
- If the total modulo 10 is 0, the number is valid
Example:
For card number 49927398716: 4+(1+8)+(9+4)+(2+2)+(7+4)+(9+8)+(7+6)+(1+2) = 70, which is valid
Card Information
Important Notice
These are FAKE credit card numbers generated for testing purposes only. They are not real credit cards and cannot be used for actual transactions.
Testing Usage
Use these numbers to test payment forms, validation logic, and other development needs without using real card information.
Security
Never use real credit card numbers in development environments. Always use test numbers like these to protect sensitive information.