An experimental plugin for viewing Deep Zoom Images (DZI) with napari and zarr.

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An experimental plugin for viewing Deep Zoom Images (DZI) with napari + zarr + dask.

This napari plugin was generated with Cookiecutter using with @napari's cookiecutter-napari-plugin template.


The DZI File Format is a pyramidal tile source specification where individual tiles are RGB/RGBA JPEG/PNG images. DZI is a very popular tile source for zoomable web-viewers like OpenSeadragon, and as a result many tile sources are available over HTTP. This plugin wraps a DZI tile source (local or remote) as a multiscale Zarr, where each pyramidal level is a zarr.Array of shape (level_height, level_width, 3/4), allowing the same images to be viewed in napari + dask.


You can install napari-dzi-zarr via pip:

pip install napari-dzi-zarr


This high-resolution scan of Rembrandt's Night Watch is available thanks to R.G Erdmann. More examples can be found on

$ napari

Rembrandt's Night Watch in napari


Contributions are very welcome. Tests can be run with tox.


Distributed under the terms of the BSD-3 license, "napari-dzi-zarr" is free and open source software


If you encounter any problems, please file an issue along with a detailed description.


  • 0.1.2

Last updated:

  • 06 April 2021

First released:

  • 20 August 2020


Supported data:

  • Information not submitted

Plugin type:

Open extension:

GitHub activity:

  • Stars: 6
  • Forks: 3
  • Issues + PRs: 4

Python versions supported:

Operating system:


  • napari-plugin-engine (>=0.1.4)
  • numpy (>=0.1.19)
  • zarr (>=0.2.4)
  • dask[array] (>=2.23.0)
  • fsspec (>=0.8.0)
  • requests (>=2.24.0)
  • aiohttp (>=3.6.2)
  • imageio (>=2.9.0)

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