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XL Converter vs GraphicsMagick: catalog facts
XL Converter	GraphicsMagick
Free Free and open source under the GPLv3.	Free Free and open source.
Windows, Linux	Windows, macOS, Linux, Command line
Supports JPEG XL, AVIF and JPEGLI encoding Lossless, reversible JPEG to JPEG XL transcoding	Reads and writes over 92 image formats, including AVIF, HEIC and JXL Multi-threaded processing with OpenMP
macOS build is a deprecated beta Focused on conversion rather than editing	Command-line and library only, with no graphical editor Takes some learning for complex operations
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: MIT
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 October 1, 2026

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