ImageOptim alternative for every platform

ImageOptim excels on macOS with CPU codec chains but lacks modern formats and Windows/Linux support. Compresso runs in any browser with AVIF, WebP, and HEIC input.

How it works

1. Open Compresso in Chrome, Firefox, or Safari
2. Compress or convert locally
3. Install as PWA for offline use

Common questions

Lossless PNG?

Compresso focuses on upload optimization; PNG lossless is a known gap vs desktop chains.

npm install compresso.js

Related

• offline image compressor
• compress heic online
• tinypng alternative