A Credit Card Validator is a software tool that helps users validate the authenticity and validity of credit card numbers. Credit Card Validator tools are commonly used by businesses that accept credit card payments online to ensure that the credit card information provided by customers is accurate and valid.

Credit Card Validator tools typically work by analyzing the credit card number provided by the user and checking it against a set of rules and algorithms used by credit card companies to generate valid credit card numbers. The tool will then output a validation result indicating whether the credit card number provided is valid or invalid, and if valid, the type of credit card (Visa, Mastercard, American Express, etc.).

Credit Card Validator tools can help prevent fraudulent activity by detecting and flagging invalid or suspicious credit card numbers. This can help protect both businesses and consumers from fraudulent transactions and identity theft.

Some Credit Card Validator tools are standalone applications that can be installed on a computer, while others are web-based and can be accessed through a web browser. Some credit card processing services may also provide their own built-in Credit Card Validator tools as part of their payment processing software.