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FileOptimizer vs Optimage: catalog facts
FileOptimizer	Optimage
Free Free and open source under the AGPL-3.0 licence.	Freemium Free for 24 images per day; a full licence costs $15.
Windows	macOS
Lossless size reduction with no quality loss Supports a very wide range of file formats	Automatic compression at consistent visual quality Supports many image formats plus MP4, WebM and PDF
Windows only Size savings depend heavily on the file type and how it was created	macOS only Free tier limited to 24 images per day
Downloadable app	Downloadable app
Open source	Closed source
License: AGPL-3.0-or-later	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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