CheetahO is a website optimization system that compresses images up to 60% in order to speed up website loading. All the stored files are deleted after a few hours for privacy reasons. Currently, there is a paid plan that costs €4 a month and has a limit of 1000 images, and a free plan with a limit of 500 images. The API returns URLs of optimized images, and information about processed images such as new size and saved data. JSON is used for responses.