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Resizer vs GraphicsMagick: catalog facts
Resizer	GraphicsMagick
Freemium Lite edition is free; a Pro licence is sold on the den4b site.	Free Free and open source.
Windows	Windows, macOS, Linux, Command line
Simple drag-and-drop batch workflow Fit, fill and crop, or stretch resize modes	Reads and writes over 92 image formats, including AVIF, HEIC and JXL Multi-threaded processing with OpenMP
Windows only Limited to BMP, GIF, PNG, JPEG and TIFF	Command-line and library only, with no graphical editor Takes some learning for complex operations
Downloadable app	Downloadable app
Closed source	Open source
License: CC-BY-NC-ND-3.0	License: MIT
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 October 1, 2026

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