Free Tool
Credit Card Validator
Check if a credit card number format is valid using the Luhn algorithm. Detect card type (Visa, Mastercard, etc.) and catch typos.
100% local - no data sent
Enter the card number
Important
This tool only checks if the number format is correct (Luhn algorithm). It doesn't verify if the card exists, is active, or has funds. Never share your card number with strangers.
How does it work?
The Luhn algorithm is a mathematical formula used to validate card numbers. It detects common typos and made-up numbers, but doesn't guarantee a card actually exists.
Use cases:
- Verify a card before an online purchase
- Detect typing errors
- Validate test numbers
Beware of card scams
If someone asks for your card details for 'verification', it's probably a scam.
Analyze a scam