Only JPEG, GIF AND PNG formats can be optimized. Images should have a maximum file size of 4MB. Login if you want to remove this restriction and manage optimizer settings.
CheetahO optimizer can strip unnecessary metadata and compress images to reduce file size and ensure faster website loading times or fit the size under some software limits.
With CheetahO you can optimize JPEG, PNG or compress large GIF images. Gif optimization can be done without losing image transparency.
The actual image size reduction percentage may vary depending on what optimizations have been done previously for a particular image, but it can reach 80% in some cases, so give it a try.