Image file format created mainly for web use, it has been designed as a patent-free replacement for GIF and also has some additional features. PnP
PNG is an image format that uses lossless compression, similar to the GIF format. How the PNG format differs, however, is that the GIF format involves...
A lossless file format created to overcome deficiencies of the Graphics Interchange Format (GIF), such as the limited number of colors.