Compare software

Image Optimizer vs jpegoptim: catalog facts
Image Optimizer	jpegoptim
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-3.0 licence.
Linux	Windows, Linux, Command line
Lossless compression with identical pixels Processes a whole folder at once	Small, fast tool focused on one job Easy to use in scripts and batch jobs
Only PNG and JPEG Overwrites the original files in place	Handles JPEG files only No graphical interface
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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