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nomacs vs FastRawViewer: catalog facts
nomacs	FastRawViewer
Free Free and open source under the GPL 3.0.	Paid Paid software from LibRaw, sold individually or in bundles with seasonal discounts.
Windows, macOS, Linux	Windows, macOS
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Renders the actual RAW data rather than embedded JPEG previews RAW histogram, RAW statistics and highlight inspection for judging exposure
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	Paid software with no free tier A viewer and culling tool, not a full RAW editor
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License: Proprietary
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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