NEW: OpenSilver 3.2 Brings WPF Apps to iOS, Android, and Beyond with MAUI Hybrid!

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OpenSilver

WPF/Silverlight for the Modern Web

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OpenSilver

WPF/Silverlight for the Modern Web

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OpenSilver

WPF/Silverlight for the Modern Web

OpenSilver is a free, open-source UI framework for building modern .NET web applications in C# and XAML. It is professionally supported by Userware.

OpenSilver is a free, open-source UI framework for building modern .NET web applications in C# and XAML. It is professionally supported by Userware.

  • Download SDK
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  • Gallery
  • Success Stories
  • What’s New and Roadmap
  • Source code on Github
  • EULA
  • Download SDK
  • Documentation
  • Gallery
  • Success Stories
  • What’s New and Roadmap
  • Source code on Github
  • EULA
  • Migration Service FAQ
  • SL Migration Support Plans
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  • Upload Your .XAP
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  • Migration Service FAQ
  • SL Migration Support Plans
  • Pro Services Subscriptions
  • Upload Your .XAP
  • Jobs
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With thanks to the Microsoft teams behind .NET for WebAssembly and the open-source WPF codebase that help power OpenSilver.
© 2025 Userware - All Rights Reserved. - Microsoft, Silverlight, Visual Studio, LightSwitch, .NET, and WPF are trademarks or registered trademarks of the Microsoft group of companies. OpenSilver is not affiliated with Microsoft. OpenSilver is a trademark of Userware. Other trademarks are the property of their respective owners.
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