Zlib License

zlib license
AuthorJean-loup Gailly and Mark Adler
Latest version1.2.11
PublisherJean-loup Gailly and Mark Adler
Published15 April 1995
SPDX identifierZlib
Debian FSG compatibleYes
FSF approvedYes
OSI approvedYes
GPL compatibleYes
CopyleftNo
Linking from code with a different licenceYes

The zlib license is a permissive software license which defines the terms under which the zlib software library can be distributed. It is also used by many other open-source packages. The libpng library uses a similar license, libpng license, sometimes referred interchangeably as zlib/libpng license.

The zlib license has been approved by the Free Software Foundation (FSF) as a free software license, and by the Open Source Initiative (OSI) as an open source license. It is compatible with the GNU General Public License.