Credit Card Number Generator - Validator

Welcome to the Credit Card Number Generator & Validator tool! This application is designed to help you effortlessly create and validate credit card numbers, ensuring they meet the necessary criteria for testing and development purposes.

Key Features:
  • Generate Valid Credit Card Numbers: Quickly generate valid credit card numbers based on popular card types, including Visa, MasterCard, American Express, and Discover. Each generated number adheres to the appropriate algorithms and formatting rules.
  • Validate Credit Card Numbers: Input a credit card number to verify its validity. Our tool checks the number against established algorithms, such as the Luhn algorithm, to confirm whether it's a legitimate card number.
  • User-Friendly Interface: The intuitive interface allows users of all skill levels to generate and validate credit card numbers with ease. Simply select the card type, click a button, and receive your results in seconds.
  • Secure and Confidential: Your privacy is our priority. This tool does not store any credit card numbers generated or validated, ensuring your data remains confidential.
How It Works:
  1. Select the type of credit card you want to generate (e.g., Visa, MasterCard).
  2. Click the 'Generate' button to create a valid credit card number.
  3. To validate a number, input it in the provided field and click 'Validate.' The tool will inform you whether the number is valid or not.

Whether you're a developer testing payment systems or simply looking to generate card numbers for educational purposes, our Credit Card Number Generator & Validator is the perfect solution. Try it now and simplify your testing process!

Generate Card Number
Generated Card Number:

Validate Card Number

Validating Credit Card Numbers

Credit card validation is essential for ensuring that the entered numbers are legitimate and can be processed. A popular method for validating credit card numbers is the Luhn algorithm, a simple checksum formula that helps verify the authenticity of the card number.

Understanding the Luhn Algorithm
  1. Remove the last digit of the card number. This digit is the checksum we will validate.
  2. Reverse the order of the remaining digits.
  3. Double the digits in odd positions (starting from the right). If doubling results in a number greater than 9, subtract 9 from it.
  4. Add all the adjusted numbers together.
  5. The last digit of the original card number should equal the amount needed to make the total a multiple of 10.
Example of Validation Steps:
Step Result
Original Card Number: 4 5 5 6 7 3 7 5 8 6 8 9 9 8 5 5
Remove Last Digit: 4 5 5 6 7 3 7 5 8 6 8 9 9 8 5
Reverse Digits: 5 8 9 9 8 6 8 5 7 3 7 6 5 5 4
Double Odd Position Digits: 10 8 18 9 16 6 16 5 14 3 14 6 10 5 8
Adjust Results Above 9: 1 8 9 9 7 6 7 5 5 3 5 6 1 5 8
Sum of All Adjusted Numbers: 85
Final Check (Modulo 10): 85 modulo 10 = 5 (should match last digit)
Supported Credit Card Formats
Card Type Starting Digits (IIN Range) Card Length (Digits)
American Express 34, 37 15
MasterCard 51, 52, 53, 54, 55 16
Visa 4 13, 16, 19
Discover 6011, 622126 to 622925, 644 to 649, 65 16-19
Conclusion

By following the steps outlined above, you can effectively validate credit card numbers and ensure they are genuine and properly formatted. This is crucial for any system that handles payment processing to minimize fraud and ensure customer trust.