gifsicle 1.93 Edit GIF images and animations
Gifsicle is a command-line GIF image manipulation tool that:
Provides a batch mode for changing GIFs in place.
Prints detailed information about GIFs, including comments.
Control over interlacing, comments, looping, transparency, etc.
Creates well-behaved GIFs: removes redundant colors, only uses local color tables, etc.
Shrinks colormaps and change images to use the Web-safe palette.
Optimizes GIF animations, or unoptimizes them for easier editing.
Two other programs are included with Gifsicle:
gifview is a lightweight animated-GIF viewer, and
gifdiff compares two GIFs for identical visual appearance.