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QuickViewer vs nomacs: catalog facts
QuickViewer	nomacs
Free Free software under GPLv3.	Free Free and open source under the GPL 3.0.
Windows, macOS, Linux	Windows, macOS, Linux
Opens image archives directly Supports two-page comic viewing	Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines
Linux users need to build QuickViewer from source.	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-only	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 21, 2026

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