This package contains a set of tools to load and visualize the contents of a set of openPMD files (typically, a timeseries). The routines of openPMD-viewer can be used in two ways: (1) Use the Python API, in order to write a script that loads the data and produces a set of pre-defined plots. (2) Use the interactive GUI inside the Jupyter Notebook, in order to interactively visualize the data.