# png - Portable Network Graphics (PNG) format - man(5) - [phpMan]

[_PNG_(5)](https://www.chedong.com/phpMan.php/man/PNG/5/markdown)                                   File Formats Manual                                  [_PNG_(5)](https://www.chedong.com/phpMan.php/man/PNG/5/markdown)

## NAME
       png - Portable Network Graphics (PNG) format


## DESCRIPTION
       PNG  (Portable  Network  Graphics)  is  an extensible file format for the lossless, portable,
       well-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 well in online viewing applications, such as the World Wide Web, so
       it is fully streamable with a progressive display option.  PNG is robust, providing both full
       file integrity checking and fast, simple detection of common transmission errors.  Also,  PNG
       can store gamma and chromaticity data for improved color matching on heterogeneous platforms.


## SEE ALSO
       [**libpng**(3)](https://www.chedong.com/phpMan.php/man/libpng/3/markdown), [**zlib**(3)](https://www.chedong.com/phpMan.php/man/zlib/3/markdown), [**deflate**(5)](https://www.chedong.com/phpMan.php/man/deflate/5/markdown), and [**zlib**(5)](https://www.chedong.com/phpMan.php/man/zlib/5/markdown)

       PNG Specification (Second Edition), November 2003:

              <https://www.w3.org/TR/2003/REC-PNG-20031110/>

       PNG 1.2 Specification, July 1999:

              <https://png-mng.sourceforge.io/pub/png/spec/1.2/>

       PNG 1.0 Specification, October 1996:

              RFC 2083
              <https://www.ietf.org/rfc/rfc2083.txt>

              or W3C Recommendation
              <https://www.w3.org/TR/REC-png-961001>


## AUTHORS
       This man page: Glenn Randers-Pehrson, Cosmin Truta

       Portable  Network Graphics (PNG) Specification (Second Edition) Information technology - Com‐
       puter graphics and image processing - Portable Network Graphics (PNG): Functional  specifica‐
       tion.  ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.

       Portable  Network  Graphics  (PNG)  Specification  Version 1.2 (July 8, 1999): Glenn Randers-
       Pehrson and others.

       Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):  Thomas  Boutell
       and others.


                                          February 23, 2024                                   [_PNG_(5)](https://www.chedong.com/phpMan.php/man/PNG/5/markdown)