Emoticon
Many sites use GIF or PNG graphic files, because of their transparency and small file size capabilities. Files can be created using a raster graphics editor. Many emoticon artists design their emoticons pixel by pixel. Some emoticons are made in vector format, such as SVG, and automatically processed using a graphics library. This allows SVG files to be automatically rendered as a GIF or PNG file, which is compatible with most browsers, which SVG is not.