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nomacs vs IrfanView: catalog facts
nomacs	IrfanView
Free Free and open source under the GPL 3.0.	Freemium Free for private, educational and charitable use. A paid licence is required for…
Windows, macOS, Linux	Windows
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Opens instantly, even on old hardware Batch conversion and renaming across whole folders
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	Windows only and closed source Commercial use needs a paid licence
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
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 21, 2026

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