If you have a lot of images to compress or need a larger image optimized, then software that you download and use on your computer may be a more suitable solution. Software to optimize a GIF on your computer You can see the results on the color table below and also download all the files we compressed via this link (2349 kilobyte kb). We tested each service to see how effective they each are at reducing image size of GIF images. They are however limited with what file size you can upload and they all allow the GIF image format. We found Kraken to be the most effective at compression for file support, it does also have the lowest limit and only allows files under 1000 bytes to be uploaded without signing up. These online image resizer apps will allow you to reduce the file size of a GIF. There is no need to download any software to compress a GIF image for the purpose of size reduction. For example Twitter supports GIF uploads of just 15MB, anything other that will need to be compressed into a smaller file size. Looking to share to GIF images on social media, be sure to compress the file enough to allow it to be uploaded. By reducing the size of your GIF image and if you are planning to save for web, you are also helping to decrease page load times, reduce server resources, save power and so on. If you do notice a change in image quality, try toggling the number of colors in compressed file format. Compressing a GIF image will not usually reduce image quality. Many of these services have limits to the maximum file size. Fortunately there are many free tools online to compress your GIF images on the web and create an optimal image which supports animation for sharing.