Checked
1
Credit Card Validator
Validate card number format and checksum for test scenarios.
Free · no login · browser-based
Card number validator
Validation summary
Passed
1
Failed
0
Validation checks syntax and checksum rules only. It does not query issuers, governments or identity databases.
Validation details
| Value | Status | Context | Details |
|---|---|---|---|
4111 1111 1111 1111 | Valid | Visa | Length and Luhn checksum passed |
How it works
The validator normalizes input digits, applies length checks, and evaluates the Luhn checksum to determine whether the number is syntactically valid.
Formula
sum = luhn_transform(all_digits)
valid if sum % 10 == 0Validation here checks structure and checksum only; it does not verify account status or issuer systems.
Example
Example: 4111 1111 1111 1111 passes checksum validation and returns a valid format status.
FAQ
Does valid mean active card?
No. It only means the number format and checksum are valid.
Can I validate with spaces or dashes?
Yes, non-digit separators are ignored during parsing.
What brands are detected?
The tool identifies common patterns such as Visa, Mastercard and Amex.
Related tools
Important note
These numbers are randomly generated and intended for testing purposes only.