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ImageGlass vs Xviewer: catalog facts
ImageGlass	Xviewer
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.
Windows, macOS, Linux	Linux
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	Handles large images with constant memory use Ships by default in Linux Mint
Some features are reserved for the paid Pro edition The macOS and Linux builds are much newer than the Windows one	Linux only Viewing only, no real editing features
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
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 24, 2026

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