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Image Optimizer vs OptiImage: catalog facts
Image Optimizer	OptiImage
Free Free and open source under the MIT licence.	Free Free and open source under the LGPL-2.1-only licence.
Linux	Linux
Lossless compression with identical pixels Processes a whole folder at once	Lossless and lossy compression modes Option to keep or remove metadata
Only PNG and JPEG Overwrites the original files in place	Linux only Young project, first released in late 2024
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: LGPL-2.1-only
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 1, 2026

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