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ImageFlowFFmpeg
Free

Free and open source under the GPL-3.0-or-later licence.

 Free

Free and open source. The codebase is mainly LGPL 2.1 with some components under the GPL…

Linux Windows, macOS, Linux, Command line
  • Outputs both GIF and WebP
  • Exposes palette, dithering and frame rate settings
  • Handles practically every container and codec there is
  • Remuxes without re-encoding, so a container change is instant and lossless
  • Small project with a single maintainer
  • Linux only
  • Command line only, with syntax that punishes guessing
  • Argument order matters in ways that are not obvious
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: LGPL-2.1
Not stated if an account is needed No account needed
Works offline Works offline

Checked October 1, 2026

Checked September 21, 2026

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