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ImageOptimTinyPNG
Free

Free and open source under the GPL.

 Freemium

The online compressor is free; the developer API and image CDN have paid plans.

macOS Web
  • Runs several optimisers and keeps whichever result is smallest
  • Removes GPS and EXIF data as part of optimising
  • Nothing to install, works in the browser
  • Handles AVIF, JXL, WebP, PNG and JPEG
  • macOS only
  • Optimisation is in place, so originals should be kept separately
  • Lossy compression changes image data
  • Requires an internet connection and uploading images
Downloadable app Web application
Open source Closed source
License: GPL-2.0 License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Needs internet

Checked September 22, 2026

Checked October 2, 2026

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