Barcode generator / Code 39
Code 39 Barcode Generator
Create Code 39 (Code 3 of 9) barcodes free online. Encode uppercase letters and digits, download as PNG or SVG. No account and no watermark.
Uppercase A-Z, digits 0-9, and - . $ / + % and space.
Preview
No watermark, no signup, unlimited PNG downloads. Rendered in your browser — the value you type never leaves your device. Vector SVG and high-resolution PNG are included with Pro.
What is Code 39 used for?
Code 39, also written Code 3 of 9, is one of the oldest alphanumeric barcode symbologies still in daily use. It encodes uppercase letters, digits, and a small set of symbols, and every character is self-checking, which made it popular long before scanners got sophisticated.
It remains standard in defence and automotive supply chains, healthcare asset tracking, and older library and government systems. It produces wider symbols than Code 128 for the same data, so choose it when a downstream system explicitly requires Code 39 rather than by default.
- Automotive & defence supply chains
- Healthcare and lab asset labels
- Legacy inventory systems
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