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XnConvert vs FastStone Photo Resizer: catalog facts
XnConvert	FastStone Photo Resizer
Free Free to download and use, per the developer.	Free Free for personal and educational use.
Windows, macOS, Linux, Android	Windows
More than 80 chainable batch actions Broad format support including RAW, HEIC, AVIF and JPEG-XL	Batch conversion and renaming in one tool Reads HEIC and WebP
Closed source Focused on batch work rather than editing single images by hand	Windows only Free licence covers personal and educational use only
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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