Build Mobile, Desktop and WebAssembly apps with C# and XAML. Today. Open source and professionally supported.

Pixel-Perfect. Multi-Platform. C# & Windows XAML. Today.

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What is the Uno Platform?

The Uno Platform is a UI Platform for building single-codebase applications for Windows, Web/WebAssembly, iOS, macOS, Android, and Linux.

It allows C# and WinUI XAML code to run on all target platforms while allowing you control of every pixel. It comes with support for Fluent, Material, and Cupertino design systems out of the box. Uno Platform implements a growing number of the WinRT and WinUI APIs, such as Windows.UI.Xaml, to enable WinUI applications to run on all platforms with native performance.

Use the WinUI tooling from Windows in Visual Studio, such as XAML Hot Reload and C# Edit and Continue, build your application as much as possible on Windows, then validate that your application runs on iOS, Android, macOS, and WebAssembly.

Visit our documentation for more details.

Getting Started

See the complete Getting Started guides for starting with Visual Studio, Visual Studio Code, JetBrains Rider, or Visual Studio for Mac.

For a larger example and features demo:

Uno Platform Features

Live WebAssembly Apps

Here's a list of live apps made with the Uno Platform for WebAssembly.

Let us know if you've made your app publicly available, we'll list it here!

Have questions? Feature requests? Issues?

Make sure to visit our FAQ, StackOverflow, create an issue or Discord - "Uno-Platform" channel where our engineering and community are.


There are many ways that you can contribute to the Uno Platform, as the WinRT and WinUI APIs are pretty large! Read our contributing guide to learn about our development process and how to propose bug fixes and improvements. Come visit us on our Discord Channel #uno-platform for help on how to contribute!

Contribute to Uno in your browser using, follow our guide here.

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Thanks go to these wonderful people (List made with

Uno Platform Contributors

💖 Thank you.

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