Compare software

Improve ImgSLI vs Image Compare: catalog facts
Improve ImgSLI	Image Compare
Free Free and open source under the MIT License.	Free Free and open source under GPL-3.0-or-later.
Linux	Windows, Linux
Magnifiers and split views help inspect image details Includes image difference modes and quality metrics	Compare up to 12 images in side-by-side, stacked, or grid views Synchronized zoom and pan across images
Available for Linux through Flathub.	Available for Linux and Windows
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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