Crop animated GIF image
You can also use: http://ezgif.com/crop?url=http://link/to/image.gif
GIF and WebP cropping tool
A simple online tool for cropping and slicing animated GIF and WebP images.
Just upload the GIF and use your mouse or trackpad to select the part of the image you want to crop.
You can also fill in the desired dimensions (in pixels) manually.
Cropped image will generally have smaller file size than the original.
You can select one of the predefined aspect ratios: square, 4:3, 16:9, 3:2, 2:1, golden ratio, or freely select area you want to crop.
If there seems to be any problems with the output GIF file (missing frames/strange artifacts/flickering), try to select the other option under the "Crop with" dropdown. There may be differences, depending on the compression used for the source image. More about this problem.