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The python chemistry package you were waiting for

Version 0.3
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Molecular Viewer

Built-in molecular viewer to quickly visualize your systems.

chemlab molecular viewer is fully programmable and you can include it in your PySide applications.

Python Powered

Built on the flexible, fast and well-tested scientific python stack.


Well documented and ready to get in. Write your own renderers and file handlers. Partecipate to the development!


Free as in speech and as in beer. Do I need to say more?


chemlab is based on the gorgeous numpy library. This let you write fast code without leaving the python world.


Designed to be interoperable with other common chemistry packages. Check out the list of supported file formats.