Calculate EAN-13 check digits and complete GTINs
Learn how the EAN-13 check digit works. GTINmaker helps validate and complete GTIN/EAN-13 codes for products and labels.
What is the EAN-13 check digit?
The last digit of an EAN-13 code is the check digit. It is calculated from the first twelve digits and helps detect common input errors. If a twelve-digit number is available, it can be completed to a full thirteen-digit EAN-13 code.
When is this useful?
The check digit is important when product data is prepared for item lists, labels, inventory systems or print files. A single incorrect or transposed digit can lead to a barcode not being read correctly or being rejected.
How GTINmaker helps
GTINmaker helps validate existing numbers, add missing check digits and generate EAN-13 barcodes for further use. This makes the app useful for small manufacturers, retailers, agencies and prepress workflows.
More than one code at a time
Online calculators are useful for individual numbers. If you process product codes regularly, a local app on Windows or macOS is more convenient and easier to reproduce.
FAQ
Does GTINmaker issue official GTINs? No.
Can GTINmaker calculate missing check digits? Yes, when the required digits are available.
Does GTINmaker run locally? Yes, the app is available for Windows and macOS.
Download
GTINmaker App
The GTINmaker app is available in the Apple Store and the Microsoft Store.
