Tools / developer

Luhn / Card Format Check

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Luhn checksum for card-like numbers (format only).

0 credits

About this tool

Luhn checksum for card-like numbers (format only). Runs in your browser against FatBaby's platform (free / zero-credit for this operation).

How to use Luhn / Card Format Check

  1. Open the Luhn / Card Format Check tool and fill in the fields.
  2. Click Process to run the operation with your FatBaby credits.
  3. Copy or download the result from the page.
  4. To automate the same workflow, call the matching REST endpoint with your API key.

Need to automate this?

Use the same workflow programmatically via POST /v1/tools/luhn-check.

Get API keyDeveloper APIsDocumentation

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FAQ

How many credits does this use?

About 0 credits per run (same rate as the public API).