To use Card Validator, Paste card no in the given input box below and click on validate credit card button.
About Credit Card Validator
Ensure Data Integrity with the ToolSeel.com Credit Card Validator
In the world of e-commerce and online transactions, data accuracy is paramount. A simple typo when entering a credit card number can lead to failed payments, frustrated customers, and lost revenue. For developers and quality assurance testers in Sri Lanka and across the globe, ensuring that your application can correctly identify a valid card number format is a critical first step. The Credit Card Validator at ToolSeel.Com is the essential tool for this purpose.
This utility is specifically designed to check whether a credit card number adheres to the industry-standard formatting rules. It performs a mathematical check to confirm its structural integrity before it's ever sent to a payment gateway.
It's crucial to understand that this tool does not verify if a card is real, active, or has sufficient funds. It is strictly a formatting and structural validation tool for development and testing purposes. As of August 26, 2025, using our validator at ToolSeel.Com is a best practice for building robust and user-friendly payment systems.
What Our Validator Checks For
Our Credit Card Validator performs several key checks in an instant to determine the structural validity of a number.
Luhn Algorithm (Mod-10 Check): This is the core of the validation. It uses a checksum formula to verify the sequence of digits, effectively catching most accidental input errors like typos or transposed digits.
Issuer Identification: The tool analyzes the first few digits of the number (the Issuer Identification Number or IIN) to identify the card brand, such as Visa, Mastercard, American Express, and more.
Number Length: Based on the identified card issuer, the validator confirms that the number has the correct length (e.g., 16 digits for Visa/Mastercard, 15 for Amex).
Whether you're in Colombo developing a new e-commerce platform or a tester anywhere in the world, the Credit Card Validator at ToolSeel.Com is your go-to resource for ensuring data quality from the very first step.
Credit Card Validator Key Features
Luhn Algorithm Check
Verifies if the number is mathematically valid using the Mod 10 checksum.
Identify Card Brand
Automatically detects the card issuer (e.g., Visa, Mastercard, Amex).
Bulk Number Validation
Paste and validate a whole list of card numbers in a single operation.
Instant Results
Just type or paste a card number to get an immediate validation status.
Safe and Secure
Your data is never stored, viewed, or shared. Validation is 100% private.
Developer & QA Tool
Perfect for testing payment forms and data validation rules before deployment.
Credit Card Validator FAQs
This tool checks if a credit card number has a mathematically correct format using the Luhn algorithm. It verifies the number's structure, checksum, and length, identifying the card issuer (like Visa or Mastercard). It does not connect to any bank or financial network.
Absolutely not. This tool CANNOT verify if a card is real, active, or has sufficient funds. It only performs a mathematical check on the number sequence. For actual payment processing, you must use a secure payment gateway, as this tool has no financial capabilities.
The validation is based on the Luhn Algorithm (also known as the Mod-10 check). This is a checksum formula used to validate a variety of identification numbers. The tool checks if the last digit of the card number correctly corresponds to the preceding digits.
Primarily, developers and software testers use this tool. It helps them test payment forms, e-commerce checkout processes, and data validation rules in their applications. It allows them to quickly check if their code correctly identifies structurally valid numbers before processing.
Never use your real credit card number here. While our tool does not store or log any data you enter, you should only use it for testing purposes with non-sensitive, generated numbers. Your financial security is paramount; always protect your real card details.