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*Details: File format summary



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Name Portable Network Graphics
Version 1.2
Other names PNG (1.2)
Identifiers PUID:  fmt/13
MIME:  image/png
Apple Uniform Type Identifier:  public.png
Classification Image (Raster)
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 priority over Portable Network Graphics (1.0)
Has priority over Portable Network Graphics (1.1)
Is subsequent version of Portable Network Graphics (1.1)
Technical Environment  
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
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