Rotate a GIF online
For permanent links you can use: https://ezgif.com/rotate?url=https://example.com/source-image.gif
Online animated GIF rotator
This is a GIF image transformation tool.
Here you can flip the image (mirror) horizontally and vertically, and rotate (spin) it using presets or by entering freely chosen degrees, clockwise and counter-clockwise.
This tool can rotate animated GIF, WebP, APNG and FLIF files, as well as images in any other well known format including JPG, PNG, BMP, TIFF and others. The tool can also rotate HEIC images, but as this format is not supported by any browsers, you won't see the preview.