This free online tool is all you need for compressing GIF animations. In just two simple steps it will take care of lossy GIF optimization for you. You can compress multiple files at once and upload GIFs up to 50MB in size.
Click on UPLOAD FILES, then choose up to 20 GIF files that you want to compress. Wait until the compression process is complete.
Download each file individually or use DOWNLOAD ALL button to get them all at once in a ZIP archive.