napari is a fast, interactive, multi-dimensional image viewer for Python. It’s designed for browsing, annotating, and analyzing large multi-dimensional images. It’s built on top of Qt (for the GUI), VisPy (for performant GPU-based rendering), and the scientific Python stack (numpy, scipy).



napari can be installed on most macOS, Linux, and Windows systems with Python 3.6 or later by running:

$ pip install napari

tutorials & getting started

If you are just getting started with napari, we suggest you check out the tutorials at The documentation presented here is more technical and focuses on understanding how napari works.

developer introduction

Information on specific functions, classes, and methods is available in the API Reference.

Indices and tables