圖片減肥工具 - Radical Image Optimization Tool（簡稱 RIOT），可以將各式各樣圖片檔的「大小」最佳化後輸出為JPG、GIF、PNG格式，還有指定大小的壓縮功能（Compress to size），對於加快網頁讀取的速度，或者，應付有大小限制的圖片上傳是很有幫助的。（阿榮）
下載連結→ https://www.azofreeware.com/p/riot.html
官方網站：RIOT
軟體性質：免費軟體
介面語言：英文
系統需求：Windows
關鍵字：RIOTNoinstall, RIOTPortable
Radical Image Optimization Tool (RIOT for short) is a free image optimizer that will let you to visually adjust compression parameters while keeping minimum filesize.
It uses with a side by side (dual view) or single view interface to compare the original with the optimized image in real time and instantly see the resulting file size.
It is lightweight, fast and simple to use, yet powerful for advanced users. You will be able to control compression, number of colors, metadata settings and much more, and select image format (JPG, GIF or PNG) for your output file.