DEV3 Free Barcode Generator — Source Code (React + Tailwind)

Source code of the DEV3 Barcode Generator, a barcode maker for EAN-13, EAN-8, UPC-A, Code 128, Code 39 and ITF with check-digit handling, SVG/PNG download and batch sheets, built on JsBarcode.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/barcode-generator shows the finished tool running.

What is in the download

• A standalone Vite + React + TypeScript + Tailwind CSS project: src/tool holds the tool, shared pieces sit beside it
• package.json with exact versions plus a lockfile, so npm ci works
• README.md (run, build, embed in Next.js or plain React) and an MIT LICENSE

What the code does

• GS1 check digit calculation and verification
• Per-line validation in batch mode
• SVG, PNG and combined sheet export
• Colour, size and margin controls

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4, jsbarcode.

Install and customise

The How to install and How to use tabs list the steps. In short: unzip, npm ci, npm run dev, then copy the tool folder into your own app if you want to embed it.

Good to know

• A browser-only tool: there is no backend or database in the code.