Luhn Card Check
Developer · v1.0.0 · runs fully in the browser, data never leaves your device
✓ Check digit is correct
- Length: 16 digits
- Card network (inferred from prefix):Visa
- Based on the first 15 digits, the check digit should be
2, but it is2
Luhn only catches errors like a single wrong digit or two adjacent digits swapped. It doesn't mean the card number is real or usable. It's a basic input check, not fraud control.
Batch validation
Generate test card numbers
For form validation in test environments only. Generated numbers satisfy Luhn but belong to no real account.