Here you can find instructions for making identifiers and markings according to GS1 standards.
In this section, you will find all the instructions for our services. You can also log in to our services or GS1's remote support.
The Check Digit Calculator counts the last number of the unique identifiers, i.e. the check number.
With the global Verified by GS1 service, you can find information about the GS1 identifiers.