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JarkViewer vs nomacs: catalog facts
JarkViewer	nomacs
Free Free and open source.	Free Free and open source under the GPL 3.0.
Windows	Windows, macOS, Linux
Opens AVIF, HEIC and JPEG XL without extra codecs Handles animated images, RAW files and Live Photos	Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines
Windows only Viewer only, with no editing or library features	Not an editor; adjustments are minimal The interface exposes a lot of panels at once
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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