EAN-13 Composite barcode generator
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About EAN-13 Composite
EAN-13 Composite adds a 2D component above an EAN-13 to carry extended Application Identifiers such as lot and expiry.
Related barcode types
Guides
- EAN-13 structure and parity: how 13 digits fit in a 12-position symbol
The 95-module EAN-13 envelope, the L/G/R encoding tables, and the parity scheme that encodes the 13th digit without printing it. Includes the full G-code table, the left-half parity-pattern lookup, a worked decode of 5901234123457, and how the GS1 prefix system is assigned.
- UPC vs EAN: Which One Do You Actually Need?
UPC-A and EAN-13 are the same standard with a different digit count. How to pick one, and the few cases where the choice matters.
- How the EAN-13 Check Digit Is Calculated (With a Worked Example)
A complete walkthrough of the EAN-13 check digit algorithm, a worked example with a real barcode, why the check digit exists, and how the same algorithm underlies UPC-A, ISBN-13, and every GTIN format.