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GraphicsMagick vs Gifsicle: catalog facts
GraphicsMagick	Gifsicle
Free Free and open source.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Reads and writes over 92 image formats, including AVIF, HEIC and JXL Multi-threaded processing with OpenMP	Creates, edits and splits animated GIFs from the terminal Optimizes GIF size by trimming colours and colour tables
Command-line and library only, with no graphical editor Takes some learning for complex operations	GIF format only Command-line only, no preview window
Downloadable app	Downloadable app
Open source	Open source
License: MIT	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 October 2, 2026

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