gifsicle

Create, edit, manipulate, and get information about GIF files. More information: https://www.lcdf.org/gifsicle.

• Optimize a GIF as a new file:

gifsicle path/to/input.gif --optimize=3 -o path/to/output.gif

• Use batch mode (modify each given file in place) and unoptimize a GIF:

gifsicle -b path/to/input.gif --unoptimize

• Extract a frame from a GIF:

gifsicle path/to/input.gif '#0' > path/to/first_frame.gif

• Make a GIF animation from selected GIFs:

gifsicle *.gif --delay=10 --loop > path/to/output.gif

• Reduce file size using lossy compression:

gifsicle -b path/to/input.gif --optimize=3 --lossy=100 --colors=16 --dither

• Delete the first 10 frames and all frames after frame 20 from a GIF:

gifsicle -b path/to/input.gif --delete '#0-9' '#20-'

• Modify all frames by cropping them to a rectangle, changing their scale, flipping them, and rotating them:

gifsicle -b --crop starting_x,starting_y+rect_widthxrect_height --scale 0.25 --flip-horizontal --rotate-90|180|270 path/to/input.gif