Credit Card Validator – Luhn & Brand Check for Card Numbers
Verify credit card numbers, detect issuers (Visa/Mastercard/AmEx), and ensure Luhn compliance before accepting payments or testing forms.
Credit Card Validator
Validate credit card numbers with Luhn algorithm and brand detection
Enter credit card number to validate
Or drag and drop a file
Validation result will appear here
lightbulbPopular Use Cases
Validate credit card numbers in checkout forms before processing payments
Identify card brands (Visa, Mastercard, Amex) to display correct logos and apply rules
Use test card numbers to validate payment flows in development and staging
Verify card number format as first-level validation before expensive fraud checks
scienceExample Credit Cards
4111 1111 1111 1111
5555 5555 5555 4444
keyboardKeyboard Shortcuts
keyboardShow shortcutsexpand_more
Related tools
Show moreShow more
› About this tool · FAQ
Stop processing invalid credit cards! Validate card numbers instantly with Luhn algorithm verification, automatic brand detection (Visa, Mastercard, AmEx, Discover), expiry date checking, and BIN information lookup. Perfect for payment form validation and e-commerce testing. Free, works offline, completely secure.
How do I validate a credit card number?
Enter the card number, configure validation options (Luhn check, expiry validation, CVV verification), and click Validate. The tool instantly checks card format, detects brand (Visa, Mastercard, AmEx), and provides detailed validation results with BIN information.
Is this credit card validator free?
Yes, completely free with unlimited validations. No signup required, no watermarks. All validation happens in your browser for complete privacy and security of card information.
Are credit card numbers uploaded to servers?
No, all credit card validation happens locally in your browser. Card numbers never leave your computer, ensuring complete privacy and PCI compliance for sensitive payment information.
How does the Luhn algorithm work?
The Luhn algorithm validates card numbers using a checksum formula. Starting from the right, every second digit is doubled. If the result is greater than 9, subtract 9. Sum all digits - if divisible by 10, the number is valid.
Are test card numbers safe to use?
Yes, test card numbers are specifically designed for testing and will never be charged. They pass validation but are not connected to real accounts. Always use test cards for development.
What card brands are supported?
Supports Visa, Mastercard, American Express, Discover, JCB, Diners Club, UnionPay, and Maestro with their specific formatting and validation rules.
Does this tool store card information?
No, all validation happens client-side in your browser. No card information is transmitted to servers or stored anywhere. The tool is designed for privacy and security.
Can I validate expiry dates and CVV codes?
Yes, the tool can validate expiry dates (MM/YY or MM/YYYY format) and CVV codes (3-4 digits depending on card type) when provided as additional inputs.