From finding out which company owns a barcode to calculating a check digit for your barcode we have some useful tools to help.
Check digit calculator
Calculate the correct check digit for your barcodes.
GEPIR
Find out who owns a barcode.
Global Data Model (GDM)
View information about the GS1 Global Data Model.
GPC browser
Explore the Global Product Classification standard.
When to change a GTIN
Find out which product changes require the allocation of a new GTIN.
Global Model Number (GMN) generator
Generate a Global Model Number which can be used as a Basic UDI-DI.