What is Credit Card Validator?
Credit Card Validator checks if a card number is valid using the Luhn algorithm (modulus 10). It identifies the card network (Visa, Mastercard, Amex, etc.) and validates the number structure. Useful for form validation and testing payment systems.
Common Use Cases
Form Validation
Validate card numbers before submitting to payment processors.
Testing
Verify test card numbers in development environments.
Fraud Detection
Quick check to filter obviously invalid card numbers.
Data Quality
Validate card numbers in datasets and databases.
How to Use This Tool
- Enter a credit card number
- The tool validates using the Luhn algorithm
- View the detected card network
- See detailed validation results
Frequently Asked Questions
Does this check if the card is real?
No! This only validates the number mathematically. It cannot check balances, expiry, or if the card is active.
What is the Luhn algorithm?
The Luhn algorithm is a checksum formula that validates identification numbers including credit cards, IMEIs, and more.
Are the test card numbers safe?
Yes, test card numbers like 4242 4242 4242 4242 are specifically designed for testing and cannot process real transactions.