665 Portable Network Graphics 1.1 PNG (1.1) Image (Raster) Portable Network Graphics (PNG) was designed for the lossless, portable, compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits. PNG is designed to work in online viewing applications, so it is fully streamable. It can store gamma and chromaticity. PNG also detects file corruption. Binary Big-endian (Motorola) 1 Digital Preservation Department / The National Archives 11 Mar 2005 02 Aug 2005 fmt/12 PUID image/png MIME public.png Apple Uniform Type Identifier png File extension 183 PNG 1.1iCCP Signature + IHDR and iCCP chunks at BOF, IEND chunk at EOF 1 Absolute from BOF 0 89504E470D0A1A0A0000000D49484452*69434350 1 Absolute from EOF 0 0000000049454E44AE426082 184 PNG 1.1sPLT Signature + IHDR and sPLT chunks at BOF, IEND chunk at EOF 1 Absolute from BOF 0 89504E470D0A1A0A0000000D49484452*73504C54 1 Absolute from EOF 0 0000000049454E44AE426082 185 PNG 1.1sRGB Signature + IHDR and sRGB chunks at BOF, IEND chunk at EOF 1 Absolute from BOF 0 89504E470D0A1A0A0000000D49484452*73524742 1 Absolute from EOF 0 0000000049454E44AE426082 Has lower priority than 666 Portable Network Graphics Has priority over 664 Portable Network Graphics Is previous version of 666 Portable Network Graphics Is subsequent version of 664 Portable Network Graphics