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Improve ImgSLI vs dssim: catalog facts
Improve ImgSLI	dssim
Free Free and open source under the MIT License.	Free Free and open source under the AGPL-3.0-or-later license.
Linux	Windows, macOS, Linux, Command line
Magnifiers and split views help inspect image details Includes image difference modes and quality metrics	Compares PNG and JPEG images using a perceptual metric Supports alpha channels and color profiles
Available for Linux through Flathub.	Scores are not directly comparable with those from other tools.
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: AGPL-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.