GS1 Digital Link: the standard connecting products to the web
GS1 Digital Link is the standard that expresses a GS1 identifier — a GTIN, a batch, a serial number — as a web address. A single QR code then serves the checkout, logistics and the consumer alike.
The principle
A classic barcode holds only a number. A machine can read it, but it leads nowhere. GS1 Digital Link encodes that same number inside a structured URL that any phone can open.
The structure is normalised: each URL segment maps to a GS1 Application Identifier (AI). Segment 01 carries the GTIN, 10 the batch number, 21 the serial number.
Example: https://id.example.com/01/03017620422003/10/L2026-07 designates the product with GTIN 03017620422003, in batch L2026-07.
Why this changes the nature of the code
A linear barcode is frozen: what it tells the checkout in 2020 is what it will tell it in 2030. A URL points to content that evolves — a reformulated recipe, an updated origin, an urgent product recall.
The identifier stays stable and printed on the pack; the information it serves lives online. That decoupling is what makes it possible to correct a product record without reprinting millions of labels.
The role of the resolver
The URL encoded in the QR points to a resolver: a service that receives the scan, identifies the product and redirects to the right destination depending on context. One code can lead a shopper to a public page and a logistics operator to technical data.
It is also where real usage is measured: every scan is recorded before redirection, giving a view of the field that a classic barcode never offers.