create QR codes for free (Logo, T-Shirt, vCard, EPS)
Viewport Sizes and Pixel Densities for Popular Devices
在线文件转换器可以很容易地将PNG转换为ICO
KKTool工具箱 - 为开发人员提供方便的在线工具
Optimize your images with a perfect balance in quality and file size.
simple online GIF maker and toolset for basic animated GIF editing.
通过下面这种方式获取网站的favicon
