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XnView Classic vs JarkViewer: catalog facts
XnView Classic	JarkViewer
Free Offered as free software by the developer.	Free Free and open source.
Windows	Windows
Opens a very large number of image formats, including RAW and DICOM Lossless JPEG rotation and crop	Opens AVIF, HEIC and JPEG XL without extra codecs Handles animated images, RAW files and Live Photos
Classic edition is the older product; XnView MP is the cross-platform successor line Closed source	Windows only Viewer only, with no editing or library features
Downloadable app	Downloadable app
Closed source	Open source
License not stated	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 October 2, 2026

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