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GraphicsMagick vs Retrobatch: catalog facts
GraphicsMagick	Retrobatch
Free Free and open source.	Paid Paid app with a 7 day free trial.
Windows, macOS, Linux, Command line	macOS
Reads and writes over 92 image formats, including AVIF, HEIC and JXL Multi-threaded processing with OpenMP	Visual node-based workflows with multiple inputs and outputs Metadata editing and stripping without recompressing images
Command-line and library only, with no graphical editor Takes some learning for complex operations	macOS only Paid after the 7 day trial
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is 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.