Overview Squoosh is a free, open-source web tool from Google Chrome Labs that compresses and converts images in real time inside your browser—no upload required, preserving privacy and speed. It supports MozJPEG, WebP, AVIF and other encoders, and offers a before/after comparison slider plus fine-grained parameter controls.
Features & highlights
- Visual comparison: use a side-by-side slider to preview compression effects and file size changes instantly
- Multiple encodings: convert between modern and legacy image formats
- Precise controls: tweak quality, color quantization, resizing and other settings
- Local processing: runs entirely in your browser—no account, no uploads, private and fast
Use cases & target users Ideal for front-end developers, site operators, designers and content creators optimizing web performance, compressing images for email/social media, or trimming photo libraries. Simple drag-and-drop import, adjust settings, export and download—friendly for non-technical users while meeting professional needs.