Dummy Credit Card Generator & Validator

Generates realistic-looking fake credit card numbers (passing Luhn check) for testing and development. Can also validate the Luhn checksum of a number. These are NOT real credit cards.

Instructions

1. Select the 'Operation Mode': 'Generate Dummy Numbers' or 'Validate Luhn Checksum'. 2. **If Generating:** Select the 'Card Type' (or 'Random') and the 'Quantity' of numbers to generate. 3. **If Validating:** Enter the 'Card Number' you want to check. 4. Click 'Run Tool'. 5. **Results (JSON):** For 'Generate', you'll get a list of fake card numbers. For 'Validate', you'll get a boolean indicating if the Luhn checksum is valid.

Choose whether to generate fake numbers or validate an existing number's checksum.
Select the card type to generate (influences prefix and length). Only used in 'Generate' mode.
Number of dummy card numbers to generate (1-50). Only used in 'Generate' mode.
Enter the card number string (digits only or with spaces/hyphens) to validate using the Luhn algorithm. Only used in 'Validate' mode.