Codes for products EAN-13 EAN-8 How do you determine if and how many product codes you need? When do you need a new article code / GTIN? What kind of barcode do I need? Variable weight items Books and magazines Service & Support Searching codes Calculate the check digit Barcode verification service Manual GS1 barcodes How do I make my first barcode? How to create a logistics label? Free e-learning on GS1 identification keys Free e-learning on unique product identification Training: Identify product packaging uniquely with GTIN in barcode Next generation barcodes General information GS1 Digital Link Implementation guidelines Codes for locations GS1 location code / GLN Search GLN via My Locations Manager via Verified by GS1 Other codes Shipping codes / SSCC Coupon code Legal Entity Identifier / LEI Identification for healthcare Patient or staff code - GSRN UDI Application Identifiers Free online training encoding medical devices Free online training encoding pharmaceutical products