Validate Or Generate Barcode Check Digits API

What it does

Barcode Check Digit Validator checks or generates barcode check digits for EAN, UPC, and ISBN values. Send a barcode string, and use mode to validate a full code, generate a check digit for the body, or calculate the check digit directly.

The response tells you whether the barcode is valid and may include the detected format, length, the normalized barcode, and check-digit fields such as check_digit and expected_check_digit. That makes it useful when you need to catch mistyped product codes, verify imported catalog data, or finish building a barcode before storing or printing it.

Use it in inventory systems, product feeds, checkout flows, or admin tools where barcode accuracy matters. It gives you a small, focused validation step without having to implement barcode math in your own service.

If you already have a full code, validate it. If you only have the body, generate the check digit and compare the result before moving the record downstream.