DEV3 Free Image Compressor — Source Code (React + Tailwind)

Source code of the DEV3 Image Compressor, a batch image compressor that re-encodes JPG, PNG and WebP on a canvas with a quality slider, optional size limit, before/after sizes and zip download.

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

• Canvas re-encoding to JPG, WebP or PNG with a quality slider
• PNG colour-level reduction so lossless files shrink too
• Longest-side limit and a "keep original if bigger" safeguard
• Per-file and zip download through JSZip

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.