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library used for data compression.

zlib is a general purpose data compression library. All the code is thread safe.


The data format used by the zlib library is described by the following RFCs:

All functions of the compression library are documented in the file zlib.h. A usage example of the library is given in the file test/example.c which also tests that the library is working correctly. Another example is given in the file test/minigzip.c. The compression library itself is composed of all source files in the root directory.

To compile all files and run the test program, follow the instructions given at the top of In short "./configure; make test", and if that goes well, "make install" works for GNU and BSD systems.


Download version 1.2.8 (stable)
released on 28 April 2013


Extensions, plug-ins, or add-ons for this program

pigzA parallel implementation of gzip


LicenseVerified byVerified onNotes
ZlibGenium19 September 2013

Leaders and contributors

Jean-loup Gailly Maintainer
Mark Adler Maintainer
Gilles Vollant Contributor

Resources and communication

Audience Resource type URI
Users Homepage
Contributors Support <>
Users General

Software prerequisites

This entry (in part or in whole) was last reviewed on 19 September 2013.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

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