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G'MIC vs NConvert: catalog facts
G'MIC	NConvert
Free Free and open source under the CeCILL licenses.	Freemium Freeware for private use; commercial use requires a business licence from 100 euros plus…
Windows, Web, Command line	Windows, macOS, Linux, Command line
Several interfaces: command line, GIMP and Qt plug-ins, web service and C++ library Large set of image filters that can be scripted	Reads more than 500 image formats and writes about 70 More than 80 commands for transforms, adjustments, filters and metadata
Command-line syntax takes time to learn Not a standalone painting or layer-based editor	Commercial use requires a paid licence No graphical interface; XnConvert is the GUI equivalent
Downloadable app, Web application	Downloadable app
Open source	Closed source
License: CECILL-2.1	License: Freeware
Not stated if an account is 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 2, 2026

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