Full online demo and tutorial. Customize your borders in color and size 'on the fly'. Rounded borders are often interesting to provide page elements the sense of three dimensional depth. Rounded borders styles are being introduced with CSS 3 standard. However, this version of CSS standard is not yet being supported by most of the current browsers in use. This site provides an alternative solution that uses images to render rounded borders of configurable size and presentation style. Dynamic generation of border images is usually an heavy task, especially for busy sites. This class employs caching to reduce the border image generation overhead.