Overview

Squoosh is an open-source image compression tool developed by Google that runs entirely in your browser. It lets you compress, resize and compare images with a wide range of codecs — from WebP and AVIF to MozJPEG and OxiPNG — with a split-image comparison slider so you can see quality loss before you export.

Key Features

• Open source (Apache 2.0) — free forever, no account, no limits
• Client-side processing: images never leave your device
• Multiple codecs: WebP, AVIF, MozJPEG, OxiPNG, and more
• Visual comparison slider: see compression quality side-by-side
• Resize + encode: tune quality, size, and format in one place

Licence

Open source — Apache License 2.0. Completely free, no account and no usage limits.

Platforms

Any modern browser (client-side web app)

Alternatives

• MergeFrame — image grid maker (proprietary freemium)
• Photopea — free browser-based image editor (proprietary)
• ImageMagick — open source CLI image tool

Website

squoosh.app