XAML Studio Open Sourced: A Deep Dive into Microsoft's Prototyping Tool (2026)

Microsoft Breathes New Life into XAML Prototyping with Open-Sourced XAML Studio

Remember the good old days of WPF development, with tools like XamlPad and Kaxaml making UI prototyping a breeze? Well, get ready for a blast from the past with a modern twist! Microsoft has just open-sourced XAML Studio, a lightweight tool designed to streamline XAML-based UI development, particularly for WinUI and UWP projects. But here's where it gets exciting: this isn't just a dusty relic resurrected from the archives. XAML Studio has been quietly evolving since its 2017 hackathon origins, and now, under the .NET Foundation umbrella, it's poised for a community-driven renaissance.

Originally dubbed 'XamlPad+', this project aimed to recapture the essence of those beloved WPF tools. Developed as a passion project within Microsoft Garage, it gradually transformed into a standalone app focused on rapid prototyping. While initially shared partially through the Windows Community Toolkit, the recent open-source move marks a significant shift. Now, anyone can contribute to its development, access the code on GitHub (https://github.com/dotnet/XAMLStudio), and shape its future.

And this is the part most people miss: The open-source release isn't just about sharing code; it's about a major upgrade. Version 2.0, currently in development on the dev branch (https://github.com/dotnet/XAMLStudio/tree/dev), boasts a sleek Fluent Design-inspired UI, tighter integration with WinUI 3, and powerful features like live data context, property inspectors, and layout alignment tools. It even resurrects features from the original prototype, like folder support, that were left out of the initial release.

This open-source initiative positions XAML Studio as a seed project within the .NET Foundation, ensuring its long-term growth through community involvement. While the idea of open-sourcing was conceived back in 2017, the project has now reached a maturity level suitable for public collaboration.

Here's the catch: Version 2.0 is still a work in progress. Some features are experimental, documentation is evolving, and compatibility with legacy UWP workflows is partial. Integration with Visual Studio is limited to external previewing, not a full-fledged designer replacement.

Despite these limitations, XAML Studio holds immense potential for WinUI and XAML developers seeking a faster feedback loop without the overhead of full project setup. It opens doors for community contributions, issue tracking, and transparent roadmap development.

Is this the future of UI prototyping? Only time will tell. But one thing's for sure: with its open-source rebirth, XAML Studio is poised to become a valuable tool for developers, sparking innovation and collaboration in the world of XAML development.

Ready to dive in? Explore the GitHub repository (https://github.com/dotnet/XAMLStudio), check out the updated roadmap (https://github.com/dotnet/XAMLStudio/issues/34), and join the discussion on GitHub (https://github.com/dotnet/XAMLStudio/discussions/26). Microsoft's announcement blog (https://devblogs.microsoft.com/ifdef-windows/xaml-studio-is-now-open-sourced/) provides further insights into the project's history and vision.

What do you think? Will XAML Studio revolutionize UI prototyping, or will it remain a niche tool? Share your thoughts in the comments below!

XAML Studio Open Sourced: A Deep Dive into Microsoft's Prototyping Tool (2026)
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