Easy tool to decompose sprite image? [closed]

I have a lot of sprite images that contain dozens of icons. Is there an easy way to unravel the sprites into separate image files either automatically or feeding it coordinates, widths and heights?

How do I turn a sprite into a GIF?

Online sprite sheet cutter / splitter tool You can download all images at once as a ZIP archive. You can also use this tool as a sprite sheet to GIF converter, to make an animated GIF out of sprite sheet, by first slicing the sprite, and then selecting "Create GIF animation" option.

This program is pretty good at decomposing sprites into individual frames

https://github.com/ForkandBeard/Alferd-Spritesheet-Unpacker

it supports all standard bitmap formats, .png, .bmp, .gif, .tiff and does everything pretty much automatically.