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ImageGlass vs feh: catalog facts
ImageGlass	feh
Freemium A free edition plus a paid Pro edition, listed at $14.90 as a one-time purchase for one…	Free Free and open source under a variant of the MIT licence.
Windows, macOS, Linux	Linux, Command line
Over ninety formats natively, including WebP, JPEG XL, HEIC, AVIF, SVG, HDR and raw Fast navigation through large folders with predictive caching and hardware acceleration	Fast and light, usable entirely from the keyboard Slideshow, thumbnail, list and multiwindow modes
Some features are reserved for the paid Pro edition The macOS and Linux builds are much newer than the Windows one	X11 only Minimal interface with no editing tools
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT-feh
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

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