napari 0.9.1#

Fri, Sep 04, 2026

We’re happy to announce the bugfix release of napari 0.9.1! 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).

This is a bug fix release, primarily fixing a regression in how dock widgets are resized.

For more information, examples, and documentation, please visit our website, https://napari.org.

napari follows EffVer (Intended Effort Versioning); this is a Micro release containing bug fixes, so we encourage upgrading.

Improvements#

  • Allow single widget in layer controls (#9448)

Bug Fixes#

  • [bug fix] Keep playback in sync when dimension ranges change (#9440)

  • Fix out-of-sync extent in async mode (#9459)

  • Revert widget size policy change (#9484)

  • Revert the str cast of shortcut in bind_shortcut from #9076 (#9488)

Documentation#

  • Prefetch data that are problematic and causing docs build failure (docs#1103)

  • Fix incorrect image link formatting in 0.9 release notes (docs#1123)

  • Add 0.9.1 release notes (docs#1128)

  • Update version switch to set 0.9.1 to default release (docs#1129)

  • Update README image using the imshow.py example (#9467)

Other Pull Requests#

5 authors added to this release (alphabetical)#

(+) denotes first-time contributors 🥳

10 reviewers added to this release (alphabetical)#

(+) denotes first-time contributors 🥳