zlib

zlib is designed to be a free, general-purpose, legally unencumbered -- that is, not covered by any patents -- lossless data-compression library for use on virtually any computer hardware and operating system. The zlib data format is itself portable across platforms. Unlike the LZW compression method used in Unix compress(1) and in the GIF image format, the compression method currently used in zlib essentially never expands the data. (LZW can double or triple the file size in extreme cases.) zlib's memory footprint is also independent of the input data and can be reduced, if necessary, at some cost in compression. A more precise, technical discussion of both points is available on another page.
Current version: 1.2.11

History

Effective Date Table ID Version Download URL Project URL Version URL
2024-08-26 12 1.2.13 download project version
2022-03-31 11 1.2.11 download project version
2020-12-22 10 1.2.11 download project version
2019-01-17 9 1.2.7 download project version
2017-07-13 8 1.2.7 download project version
2015-06-25 7 1.2.7 download project version
2014-03-07 6 1.2.7 download project version
2013-09-10 5 1.2.7 download project version
2012-10-31 4 1.2.5 download project version
2012-05-01 3 1.2.5 download project version
2005-11-08 2 1.2.3 download project version