The widget below automatically turns the square edges of your image into rounded corners. The rounder corner pixel size can easily be adjusted. Once you submit the image, you will be taken to next window where you can set border radius size along with image quality and background colours. You can choose to set a background or keep the background transparent. You can also choose which of the four borders you wish to be curved and which should be left as default. You can either upload the image, photo or picture from your computer or you can enter the Image direct link/URL.
border-radius:10px;
-moz-border-radius:10px;
-webkit-border-radius:10px;