gifsicle

Create, edit, manipulate, and get information about GIF files. tldr-pages

On several platforms

Several platforms

Optimize a GIF as a new file

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

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

gifsicle --batch path/to/input.gif --unoptimizeIdentify

Extract a frame from a GIF

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

Make a GIF animation from selected GIFs

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

Reduce file size using lossy compression

gifsicle --batch path/to/input.gif --optimize=3 --lossy=100 --colors 16 --ditherIdentify

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

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

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

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