ToolJoltTools

Code 39 Barcode Generator

Code 39 Barcode Generator — create a scannable CODE39 barcode with a correct check digit. Download PNG. Private.

Generated from the published symbology spec with the correct check digit — scan-tested with standard readers.

🔒 Barcodes are generated locally from the published symbology specs.

Generate a real, scannable Code 39 Barcode for industrial, automotive and government inventory (letters, digits and a few symbols). The check digit is calculated automatically; download a crisp PNG, all in your browser.

About Code 39 Barcode Generator

Generate a Code 39 Barcode in your browser for industrial, automotive and government inventory (letters, digits and a few symbols). The tool implements the published symbology, draws the bars to spec and calculates the check digit automatically, so the barcode actually scans. Adjust the bar height and module width, then download a PNG. Nothing is uploaded.

How to use Code 39 Barcode Generator

  1. 1Type the data to encode (e.g. TOOLJOLT-39).
  2. 2Adjust bar height and module width if needed.
  3. 3Download the barcode PNG and place it on your label.

Why use Code 39 Barcode Generator?

  • ✓Anyone industrial, automotive and government inventory (letters, digits and a few symbols).
  • ✓Correct check digit and quiet zones so real scanners read it.
  • ✓Free, with high-resolution PNG output for labels.

Frequently asked questions

Is this a real, scannable barcode?+

Yes. It's drawn from the official CODE39 specification with proper module widths, quiet zones and an auto-calculated check digit, so standard barcode scanners and apps read it correctly.

What characters can CODE39 encode?+

Code 39 encodes uppercase A–Z, digits 0–9, and the symbols - . space $ / + %.

How do I get a valid retail (GS1) number?+

To sell in shops you need a GTIN from GS1 (the body that issues unique company prefixes). This tool renders any number you own into a compliant barcode image — it doesn't assign you a number.

Is my data uploaded?+

No — the barcode is rendered on a canvas in your browser; nothing is sent anywhere.

Embed Code 39 Barcode Generator on your website

Want Code 39 Barcode Generatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.

Embed code
<iframe src="https://tooljolt.com/tools/code-39-barcode-generator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Code 39 Barcode Generator — ToolJolt" loading="lazy"></iframe>

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