Avalonia for Visual Studio12.3
September 14, 2026

What's new

New Preview options now available, plus even more AXAML analysis helpers to help you avoid issues and find problems faster.

Select Form Factor for the Previewer

Select Form Factor for the Previewer

Easily see how your UI will look on different devices with the new Form Factor picker.

New Previewer Form Factors

The new previewer now lets you select from a set of common screen sizes so you can more easily see what your UI will look like on different devices. With this change, we've also now officially moved the new previewer out of its experimental designation and marked the old version as deprecated. If you do find something that means you need to use the legacy previewer, please let us know so that we can make sure the new version supports your scenario. This is available with licenses that include the Complete Edition of the tools.

Editor improvements

  • Adds additional analysis of Style selectors and Markup validation
  • Improved handling of Collections and DataTypes in AXAML parsing
  • Fixes color analysis to include all edge cases
  • Fixes previewer resizing getting stuck
  • No longer hides the preview while building the project
  • Adds more Toolbox icons

Other improvements in the Complete Edition

  • New editor color themes are now available
  • Preview images in AXAML files by hovering over the avares path

Thank you

We're incredibly grateful to those of you who have helped us improve the extension by reporting problems, helping reproduce issues, and suggesting improvements. We know that producing a good error report or clearly explaining why a change would be beneficial can take a lot of time and thought. We want to say a big thank you to those of you who have done this and helped make Avalonia better for everyone. Especially: Luke, Emmanuel, Max, Luke, Kelvin, Kirk, Smedis, Jeny, and more.