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FileOptimizer vs jpegoptim: catalog facts
FileOptimizer	jpegoptim
Free Free and open source under the AGPL-3.0 licence.	Free Free and open source under the GPL-3.0 licence.
Windows	Windows, Linux, Command line
Lossless size reduction with no quality loss Supports a very wide range of file formats	Small, fast tool focused on one job Easy to use in scripts and batch jobs
Windows only Size savings depend heavily on the file type and how it was created	Handles JPEG files only No graphical interface
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0-or-later	License: GPL-3.0
No account needed	No account needed
Works offline	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.