{
    "mode": "man",
    "parameter": "PNG",
    "section": "5",
    "url": "https://www.chedong.com/phpMan.php/man/PNG/5/json",
    "generated": "2026-10-06T01:57:02Z",
    "sections": {
        "NAME": {
            "content": "png - Portable Network Graphics (PNG) format\n\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "PNG  (Portable  Network  Graphics)  is  an extensible file format for the lossless, portable,\nwell-compressed storage of raster images.  PNG provides a patent-free  replacement  for  GIF,\nand can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images\nare supported, plus an optional alpha channel.  Sample depths range from 1 to 16 bits.\nPNG  is  designed to work well in online viewing applications, such as the World Wide Web, so\nit is fully streamable with a progressive display option.  PNG is robust, providing both full\nfile integrity checking and fast, simple detection of common transmission errors.  Also,  PNG\ncan store gamma and chromaticity data for improved color matching on heterogeneous platforms.\n\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "libpng(3), zlib(3), deflate(5), and zlib(5)\n\nPNG Specification (Second Edition), November 2003:\n\nhttps://www.w3.org/TR/2003/REC-PNG-20031110/\n\nPNG 1.2 Specification, July 1999:\n\nhttps://png-mng.sourceforge.io/pub/png/spec/1.2/\n\nPNG 1.0 Specification, October 1996:\n\nRFC 2083\nhttps://www.ietf.org/rfc/rfc2083.txt\n\nor W3C Recommendation\nhttps://www.w3.org/TR/REC-png-961001\n\n",
            "subsections": []
        },
        "AUTHORS": {
            "content": "This man page: Glenn Randers-Pehrson, Cosmin Truta\n\nPortable  Network Graphics (PNG) Specification (Second Edition) Information technology - Com‐\nputer graphics and image processing - Portable Network Graphics (PNG): Functional  specifica‐\ntion.  ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.\n\nPortable  Network  Graphics  (PNG)  Specification  Version 1.2 (July 8, 1999): Glenn Randers-\nPehrson and others.\n\nPortable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):  Thomas  Boutell\nand others.\n\n\nFebruary 23, 2024                                   PNG(5)",
            "subsections": []
        }
    },
    "summary": "png - Portable Network Graphics (PNG) format",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "libpng",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/libpng/3/json"
        },
        {
            "name": "zlib",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/zlib/3/json"
        },
        {
            "name": "deflate",
            "section": "5",
            "url": "https://www.chedong.com/phpMan.php/man/deflate/5/json"
        },
        {
            "name": "zlib",
            "section": "5",
            "url": "https://www.chedong.com/phpMan.php/man/zlib/5/json"
        }
    ]
}