PNG (Portable Network Graphics) - is a bitmapped image format that employs lossless data compression. PNG was created to improve and replace more simple GIF format, and to replace more complicated TIFF format. In compare 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 in World Wide Web and for graphic editing.