pyPhase is an open-source Python package for phase retrieval from phase contrast images in the Fresnel regime. For an overview, check out the pyPhase manuscript: https://arxiv.org/abs/2012.07942 Features Phase retrieval algorithms Wave propagation. Handling of different image sources and formats Tools for pre-processing such as registration of phase contrast images and motion estimation The code is publicly available from gitlab : https://gitlab.in2p3.fr/mlanger/pyPhase The API documentation is available on readthedocs : https://pyphase.readthedocs.io/