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XL Converter vs XnConvert: catalog facts
XL Converter	XnConvert
Free Free and open source under the GPLv3.	Free Free to download and use, per the developer.
Windows, Linux	Windows, macOS, Linux, Android
Supports JPEG XL, AVIF and JPEGLI encoding Lossless, reversible JPEG to JPEG XL transcoding	More than 80 chainable batch actions Broad format support including RAW, HEIC, AVIF and JPEG-XL
macOS build is a deprecated beta Focused on conversion rather than editing	Closed source Focused on batch work rather than editing single images by hand
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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