DEV3 Free Device Mockup Generator — Source Code (React + Tailwind)

Source code of the DEV3 Device Mockup Generator, places screenshots into flat canvas-drawn phone, tablet, laptop and browser frames, or beautifies them with padding, radius and shadow.

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

• Four flat device frames drawn with canvas paths
• Screenshot beautifier with window bar, radius and shadow
• Gradient, solid or transparent backgrounds and canvas ratios
• PNG export up to 3000 px wide

Tech stack

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

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.