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FastStone Photo Resizer vs XnConvert: catalog facts
FastStone Photo Resizer	XnConvert
Free Free for personal and educational use.	Free Free to download and use, per the developer.
Windows	Windows, macOS, Linux, Android
Batch conversion and renaming in one tool Reads HEIC and WebP	More than 80 chainable batch actions Broad format support including RAW, HEIC, AVIF and JPEG-XL
Windows only Free licence covers personal and educational use only	Closed source Focused on batch work rather than editing single images by hand
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 October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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