PNG (Portable Network Graphics) - is a bitmapped image format that employs lossless data compression. PNG was created to improve and replace the simpler GIF format, and to replace the more complicated TIFF format. In comparison with the GIF format, the PNG format supports RGB images without color losses, supports alpha channels, and uses DEFLATE  (open algorithm of compression), that provides higher compression of multicolored files. The PNG format is usually used on the World Wide Web and for graphic editing.