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FastRawViewer vs XnView MP: catalog facts
FastRawViewer	XnView MP
Paid Paid software from LibRaw, sold individually or in bundles with seasonal discounts.	Freemium Free for private and educational use. A commercial licence is required for business use.
Windows, macOS	Windows, macOS, Linux
Renders the actual RAW data rather than embedded JPEG previews RAW histogram, RAW statistics and highlight inspection for judging exposure	Reads more than five hundred formats including RAW, HEIC and JPEG XL Batch conversion, renaming and adjustment across whole folders
Paid software with no free tier A viewer and culling tool, not a full RAW editor	Closed source Commercial use requires a paid licence
Downloadable app	Downloadable app
Closed source	Closed source
License: Proprietary	License not stated
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 September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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