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Zlib-Libpng License (Zlib)

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This license is used for the zlib library and some other open-source libraries/packages. It is very short and very permissive. It requires you to change the name of modified software and contains a sentence removing liability from the authors of the software.

Disclaimer: this is only a short summary of the Full Text. No information on TLDRLegal is legal advice.
This summary only features select relevant parts included by the community and does not aim to replace/misrepresent the full text.

The zlib/libpng License Copyright (c)

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.

Commercial Use

Describes the ability to use the software for commercial purposes.


Describes the ability to modify the software and create derivatives.


Describes the ability to distribute original or modified (derivative) works.


Describes the ability for you to grant/extend a license to the software.

Hold Liable

Describes the warranty and if the software/license owner can be charged for damages.

Include Copyright

Describes whether the original copyright must be retained.


Describes the ability to change software's name if modified/distributed.

Include License

Including the full text of license in modified software.

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