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Squoosh4K Image Compressor
Free

Free to use.

 Freemium

Free download with a paid premium upgrade.

Web Windows, macOS
  • Side-by-side comparison makes it easy to judge quality versus file size trade-offs
  • Runs entirely in the browser with no upload needed
  • Compress to a percentage or an exact target file size
  • Batch processing of many images
  • Focused narrowly on compression and format conversion, not general image editing
  • Best suited to single images rather than batch processing
  • Some features are reserved for the paid premium tier
  • Closed source
Web application Downloadable app
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.