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nomacs vs Xviewer: catalog facts
nomacs	Xviewer
Free Free and open source under the GPL 3.0.	Free Free and open source.
Windows, macOS, Linux	Linux
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Handles large images with constant memory use Ships by default in Linux Mint
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	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 21, 2026	Official website Full listing and sources Checked September 24, 2026

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