Credit Card Number Validator
Check whether a card number passes the Luhn checksum.
This only checks number formatting, not whether a card is real or active. Nothing is transmitted anywhere.
How to use Credit Card Number Validator
- 1Type or paste a card number (spaces and dashes are ignored).
- 2The Luhn checksum result and detected card type appear instantly.
Why use this tool
- Runs entirely in your browser — no card numbers are ever transmitted.
- Detects common card types by their numbering pattern.
Frequently asked questions
Does passing this check mean the card is real and active?
No — the Luhn algorithm only checks that the number is mathematically well-formed. It cannot confirm the card exists, is active, or belongs to a real account.