GS1‑128 is a GS1 standard barcode symbology used to encode complex, structured data for supply‑chain, logistics, warehousing, and compliance applications. It is based on the Code 128 barcode, but uniquely uses GS1 Application Identifiers to encode standardized data elements such as SSCC, batch/lot numbers, expiration dates, weights, quantities, and more.
GS1‑128 is widely used on shipping labels, logistics units, and cartons, where additional product or handling information is required beyond what retail barcodes like UPC/EAN can contain.
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