Code 25

Code 25, or "Code 2 of 5" because it is arranged so that 2 out of every 5 elements (bars and spaces between them) is wide, is a bar code format used to encode numeric data. Bars and spaces have two relevant widths, wide and narrow, and are used to encode digits in pairs, one encoded by the bars and the other by the spaces. There are specified patterns used to mark the start and end of the bar code, and optional checksums. A common use for this type of code is on cartons of merchandise shipped in the supply chain for groceries.

Specs

 * Code 25 description
 * Code 25 detail

Developer libraries and modules

 * ZBar bar code reader library: cross-platform

Utilities

 * Code 25 bar code generator (web-based)
 * Online barcode generator (supports many different formats)