Aztec Code

Aztec Code is a 2D matrix barcode recognisable by the bullseye finder at its centre; it needs no surrounding quiet zone, so it fits in tight spaces.

How it works

Data rings grow outward from the central bullseye, and adjustable error correction keeps it readable even on low-quality thermal prints or phone screens.

Where it's used

The default for transport and event ticketing — rail and airline mobile boarding passes and stadium entry codes.