PNG Portable Network Graphics A lossless graphics file format that combines many of the benefits of GIF and JPEG. PNG also allows for many features that the GIF format doesn't, including 254 levels of transparency (GIF supports only one), more control over image brightness, and support for more than 256 colors. PNG also supports progressive rendering, as interlaced GIFs do, and tends to compress better than a GIF. See also: GIF, interlaced GIFs, JPEG, lossless