Riot (Radical Image Optimization Tool) is a lightweight Windows application that allows you to easily compress (reduce the file size of your photos). If you need your photo file size reduced without sacrificing quality, Riot is the application that you should use.
Once you open a photo in Riot, it will automatically optimize the image without losing quality. You can also manually set the desired photo (file) size. This will make it easier for you to resize a photo before uploading it to websites that has a minimum file size requirement.
When compressing a photo, data is always lost. But the question is that, how much photo data is lost when compressing and are the lost data necessary?
When you use RIOT, the compressed photo loses the unnecessary data first. By doing this, you won’t be able to immediately spot the difference between the original photo and the compressed photo. This makes the compression easy on the eyes of the owner of the photo. You won’t have to worry about pixelated photos due to the result of compression.