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

Source code of the DEV3 QR Code Generator, a QR generator for URLs, text, Wi-Fi, email, phone, SMS and contact cards, with colours, error correction, an optional centre logo and PNG or SVG download.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/qr-code-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

• Payload builders with proper escaping for Wi-Fi and contact formats
• Error-correction level and quiet-zone control
• Centre logo sized within the safe area
• SVG and PNG output

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4, qrcode-generator.

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.