Credit Card Number Generator & Validator
Generate valid test credit card numbers and validate card numbers using the Luhn algorithm. Supports all major card brands including Visa, MasterCard, American Express, Discover, and more.
Features
Validation
Check credit card numbers using the Luhn algorithm. Instantly validate and identify card types.
Generation
Create test numbers for all major card brands. Perfect for testing payment systems.
Format Guide
Comprehensive reference for card number formats. Learn about different card types.
Security
All processing done locally in your browser. No data stored or transmitted.
How to Use
Validating a Card Number
Enter the credit card number in the validation input field
Click the "Validate" button
View the validation result and card type (if valid)
Generating Test Numbers
Scroll to the "Generated Credit Card Numbers" section
Click "Generate New Numbers" for fresh numbers
Use the copy button next to any number to copy it
Understanding Credit Card Validation
The Luhn Algorithm
- Start from the rightmost digit (excluding check digit)
- Double every second digit
- Add digits of doubled numbers together
- Sum all digits (doubled and undoubled)
- Total should be divisible by 10
Common Use Cases
- Payment system testing
- Form validation development
- UI/UX mockups
- QA testing data generation
- Educational purposes
Frequently Asked Questions
What is the Luhn algorithm?
The Luhn algorithm is a checksum formula used to validate various identification numbers, including credit card numbers. It detects accidental errors such as single digit mistakes or transposition of adjacent digits.
Are these credit card numbers real?
No, these are test credit card numbers only. While they follow the proper format and pass the Luhn check, they cannot be used for real transactions. They are designed for testing payment systems and validation logic.
How secure is this tool?
This tool runs entirely in your browser and does not store or transmit any data. The validation and generation processes are performed locally using JavaScript, ensuring your data remains private.