Credit Card Generator
Generate valid dummy credit card numbers for testing e-commerce gateways and software validation. Supports Visa, MasterCard, Amex, and Discover.
About
This developer utility creates valid credit card numbers for testing purposes. These numbers pass the Luhn Algorithm (Mod 10 check) but are not real cards. They cannot be used for actual purchases.
Use this tool to test validation forms, checkout flows, and database field handling in your applications.
credit card
dummy data
testing
Formulas
The generator uses the Luhn Algorithm to calculate the final Check Digit:
- Step 1. Choose the IIN (Issuer Identification Number) based on the card brand.
- Step 2. Generate random digits for the account identifier.
- Step 3. Luhn Calculation: Double every second digit from the right. If result > 9, subtract 9. Sum all digits.
- Step 4. Calculate the Check Digit required to make the total sum divisible by 10.
Reference Data
| Network | Prefix (IIN) | Length |
|---|---|---|
| Visa | 4 | 13, 16 |
| MasterCard | 51-55, 2221-2720 | 16 |
| American Express | 34, 37 | 15 |
| Discover | 6011, 64, 65 | 16 |
Frequently Asked Questions
No. These numbers are mathematically valid according to the card formula but are not linked to any real bank account. Transaction attempts will decline.
Also known as the Modulus 10 algorithm, it's a simple checksum formula used to validate a variety of identification numbers, such as credit card numbers, to distinguish them from random errors.