It is easy to use GIF compressor. Just follow the procedure mentioned below:
Click on the "Select GIF" button.
Select the folder and files you want to resize.
Also, you can drag & drop files directly for compression.
Select the size.
Now, click on the "Compress & Download" button.
Wait for a moment. It won't take much time.
Congrats! Your file(s) has been compressed and downloaded automatically to your gallery/download folder.