After 8 years, Microsoft's tool for designing Windows apps is now open source.

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Microsoft has open-sourced XAML Studio, a visual development tool for designing Windows application interfaces, after 8 years. The project is now available on GitHub under the MIT license and has joined the .NET Foundation. Version 1.1 is currently available on the Microsoft Store with features like a binding debugger, IntelliSense, and alignment guides. Version 2.0 is in development with a complete Fluent UI redesign, new properties panel, and Adorners for precise layout work, with a stable release planned for later in 2026.

Microsoft Open-Sources XAML Studio