Details: File format summary

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Properties

Summary
Name	Portable Network Graphics
Version	1.1
Other names	PNG (1.1)
Identifiers	PUID: fmt/12 MIME: image/png Apple Uniform Type Identifier: public.png
Family
Classification	Image (Raster)
Disclosure
Description	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.
Orientation	Binary
Byte order	Big-endian (Motorola)
Related file formats	Has lower priority than Portable Network Graphics (1.2) Has priority over Portable Network Graphics (1.0) Is previous version of Portable Network Graphics (1.2) Is subsequent version of Portable Network Graphics (1.0)
Technical Environment
Released
Supported until
Format Risk
Developed by	None.
Supported by	None.
Source	Digital Preservation Department / The National Archives
Source date	11 Mar 2005
Source description
Last updated	02 Aug 2005
Note