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§ PRESS · CODE39EXT

Code 39 Extended generator.

A linear barcode symbology. Encode your own data or try the sample Code39 Ext!. Preview updates live - export as PNG, SVG, or print-ready PDF.

Family
Industrial - 1D Linear
Type
1D
BCID
code39ext
Cost
Always free
§ 01 · GENERATE

Live specimen

Enter any valid Code 39 Extendedpayload. Adjust scale, margin, and human-readable text below. Download when you're ready.

LIVE
PX
MM
MM
Human-readable textHRI
● OUTPUTCODE39EXT · 0×0
§ BULK
Need a whole sheet of Code 39 Extended codes? Paste one payload per line and print the lot on a single PDF.
Bulk Code 39 Extended generator →
§ 02 · ABOUT

About Code 39 Extended

REFERENCE

Code 39 Extended uses paired characters to encode the full ASCII set while remaining decodable by standard Code 39 scanners.

What a valid Code 39 Extended looks like

  • Full ASCII is encoded by pairing characters (e.g. lowercase a = +A). The symbol is roughly twice as wide per character.
  • Readers must have Code 39 Extended mode enabled to decode the shifted pairs.