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G'MICNetpbm
Free

Free and open source under the CeCILL licenses.

 Free

Free and freely redistributable.

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
  • Over 350 separate tools
  • Converters for about 100 graphics formats
  • Command-line syntax takes time to learn
  • Not a standalone painting or layer-based editor
  • No interactive or graphical tools
  • Many small programs to learn instead of one command
Downloadable app, Web application Downloadable app
Open source Open source
License: CECILL-2.1 License: GPL-3.0-or-later
Not stated if an account is needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked October 1, 2026

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