PNG

PNG, which can be pronounced 'ping' or 'P-N-G,' is a compressed raster graphic format. It is commonly used on the Web and is also a popular choice for application graphics. Unlike the JPEG and GIF formats, the PNG format supports an alpha channel, or the 'RGBA' color space. The alpha channel is added to the three standard color channels (red, green, and blue, or RGB) and provides 256 levels of transparency.