ZLIB is a data compression format, used primarily for in-transit data rather than file storage.

The Import command can encode and decode data in this format, and the ArrayTools[Compress] and ArrayTools[Uncompress] commands also support it.

The zlib compression algorithm is taken from the zlib library written by Jean-loup Gailly and Mark Adler. See http://zlib.net.

Content-Type: application/zlib

$\mathrm{data}≔\mathrm{Export}\left(''The\; quick\; brown\; fox\; jumped\; over\; the\; lazy\; dog''\,\mathrm{target}=\mathrm{direct}\,\mathrm{format}=''ZLIB''\right)$

$\mathrm{data}≔\left[\begin{array}{ccccccccccccccccccccccccccccccccccccccccccccccccccc}120& \mathrm{-100}& 11& \mathrm{-55}& 72& 85& 40& 44& \mathrm{-51}& 76& \mathrm{-50}& 86& 72& 42& \mathrm{-54}& 47& \mathrm{-49}& 83& 72& \mathrm{-53}& \mathrm{-81}& 80& \mathrm{-56}& 42& \mathrm{-51}& 45& 72& 77& 81& \mathrm{-56}& 47& 75& 45& 82& 40& 1& \mathrm{-54}& \mathrm{-25}& 36& 86& 85& 42& \mathrm{-92}& \mathrm{-28}& \mathrm{-89}& 3& 0& 107& \mathrm{-109}& 16& 48\end{array}\right]$

$\mathrm{arr}≔\mathrm{Import}\left(\mathrm{data}\,\mathrm{source}=\mathrm{direct}\,\mathrm{format}=''ZLIB''\right)$

$\mathrm{arr}≔\left[\begin{array}{cccccccccccccccccccccccccccccccccccccccccccc}84& 104& 101& 32& 113& 117& 105& 99& 107& 32& 98& 114& 111& 119& 110& 32& 102& 111& 120& 32& 106& 117& 109& 112& 101& 100& 32& 111& 118& 101& 114& 32& 116& 104& 101& 32& 108& 97& 122& 121& 32& 100& 111& 103\end{array}\right]$

$\mathrm{StringTools}:-\mathrm{FromByteArray}\left(\mathrm{arr}\right)$

$''The\; quick\; brown\; fox\; jumped\; over\; the\; lazy\; dog''$

[RFC6713] Levine, J., The 'application/zlib' and 'application/gzip' Media Types, RFC 6713, August 2012.