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JarkViewer vs IrfanView: catalog facts
JarkViewer	IrfanView
Free Free and open source.	Freemium Free for private, educational and charitable use. A paid licence is required for…
Windows	Windows
Opens AVIF, HEIC and JPEG XL without extra codecs Handles animated images, RAW files and Live Photos	Opens instantly, even on old hardware Batch conversion and renaming across whole folders
Windows only Viewer only, with no editing or library features	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 October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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