Online Tools

Image Optimizer（可以用来优化图片，格式互转，图片处理的在线工具站已然不少了~~）
Use this tool to easily optimize regular gifs, animated gifs, jpgs, and pngs, so they load as fast as possible. Furthermore, convert from one image type to another.

FavIcon Generator（ico生成，很方便~~）
Generate a favicon using any regular image with this tool. A favicon is a small, 16×16 image that is shown inside the browser’s location bar [...]