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The zlib/libpng License
SPDX ID: ZlibAdded 2026-04-19
SoftwareOSI ApprovedFSF LibreGPLv2 CompatibleGPLv3 Compatibletl;drLegal VerifiedReview Tracked
Blue Oak Rating
BronzeMissing nonessential elements or extra restrictions
License Review Status from OSI
👤 Unknown🗓️ First Submitted: 2010-08-30📅 1 days💬 5 Events
Latest event👤 Kai-Uwe Behrmann📅 2010-08-31Discuss
Explains why licensing questions are rarely discussed publicly and suggests OSI should provide a license-compatibility table to fill that gap.OSADL Open Source License Checklist
CopyleftNoSource DisclosureNoPatent HintsUnknownOSADL Data Timestamp2026-02-12
Full Text
zlib License
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.