FileopiaCode 39 Barcode Generator
Make Code 39 barcodes for inventory, badges and labels. Free download as PNG or SVG.
- Upload
- Options
- Download
- ✓ 100% free
- ✓ No sign-up
- ✓ No limits
- 🔒 Files never leave your device
How to: Code 39 Barcode
- Enter the number – the preview checks it live.
- Adjust bar width, height and colours.
- Download as PNG or SVG.
Code 39 encodes letters, numbers and a few symbols and is widely used for ID badges, inventory and industry labels.
Common uses
- Create employee or student ID badges.
- Label equipment and assets.
- Track parts in a workshop.
Tips for best results
- Code 39 is wide – use Code 128 when space is tight.
Where Code 39 is used
Code 39 is self-checking and simple, which made it popular in automotive, defence, healthcare and asset tracking, and for ID badges. It can encode upper-case letters, so it works for serial numbers like “ASSET-0042”.
Size considerations
Code 39 is less compact than Code 128, so long values make wide barcodes. For small labels with long codes, choose Code 128 in the Barcode Generator.
Why use Fileopia for Code 39 Barcode?
| Fileopia | Typical upload-based sites | |
|---|---|---|
| What you type is sent to a server | No – stays in your browser | Often |
| Sign-up required | Never | Often for bigger jobs |
| Hourly / daily task limits | None | Common on free plans |
| Works offline after loading | Yes, for most tools | No |
Private by design
Everything you type is calculated by JavaScript in this tab. Nothing is sent to Fileopia or anyone else, and there are no accounts or tracking cookies tied to what you enter.
- Test it yourself: once this page has loaded, switch off Wi‑Fi or mobile data and run the tool – it keeps working.
- Check the network: open your browser’s developer tools (F12 → Network) while processing; you will see no file upload requests.
- Nothing to delete: close the tab and the data is gone – there is no server copy, no retention period and no account.
Frequently asked questions
Is the check digit calculated?
Yes. For EAN and UPC you can leave out the last check digit and it is added automatically.
Which characters are allowed?
Upper-case letters A–Z, digits 0–9 and - . $ / + % and space.
Is Code 39 Barcode really free?
Yes. Every tool on Fileopia is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. Fileopia processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Does it work on mobile?
Yes. Fileopia works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.