Code 39

Code 39 Barcode Generator

Q: Code 39 or Code 128 — which one?

Code 128 is more compact and supports mixed case and more characters — the modern logistics choice. Code 39 is older and longer but works with legacy equipment and needs no check digit, suiting existing Code 39 systems.

Q: Why is my barcode longer than expected?

Code 39 uses more modules per character, so longer content makes a longer code. For a more compact result, use Code 128.

Create Code 39 barcodes used in industry, warehousing and ID badges — supports digits and uppercase letters, generated locally, no upload, no signup.

qrdiv's free Code 39 barcode generator encodes digits and uppercase letters into the 1D code common in industry and ID badges. Everything is generated locally in your browser — no upload, no signup — with PNG/SVG/PDF/EPS downloads.

Generate your barcode

Fill in the fields on the left, preview live on the right, and download in multiple formats.

Content

Appearance (color / size)

Live preview

Fill in the content, then generate

Download

Scannability check

Quiet zone, module size and contrast are checked after you generate.

Why use Code 39

No check digitSimple structure with no mandatory check digit — encode any number instantly.

Industry & IDsLong-established and widely supported in defense, automotive and government ID use.

Local, no uploadContent is encoded in your browser, never sent to a server — works offline.

Vector downloadSVG/PDF/EPS vectors stay sharp for label printing, all watermark-free.

FAQ

Which characters does Code 39 support?

It supports 0-9, uppercase A-Z, and the symbols - . space $ / + %. Lowercase letters are converted to uppercase automatically.

Code 39 or Code 128 — which one?

Why is my barcode longer than expected?