Uno Platform

Uno Platform is an open-source UI platform that enables .NET developers to build cross-platform applications from a single codebase, targeting Windows, WebAssembly, iOS, macOS, Android, and Linux. It combines AI-powered visual tooling, a runtime visual designer (Hot Design), and MCP integrations to dramatically accelerate developer productivity. The platform is free and open source under the Apache 2.0 license, with an optional paid Studio tier that unlocks advanced AI and design features.

• Cross-Platform Single Codebase: Write once and deploy to Windows 10/11, iOS, Android, WebAssembly, macOS, and Linux without platform-specific rewrites.
• Hot Reload: Instantly see UI and code changes reflected in your running app without restarting, speeding up the development loop.
• Hot Design: A runtime visual designer that lets you inspect and edit your app's UI live, switching seamlessly between design and code.
• AI-Powered MCP Integration: Model Context Protocol (MCP) servers give AI agents eyes and hands into your live app's runtime state and visual tree, compatible with Visual Studio, VS Code, Claude Code, GitHub Copilot CLI, OpenAI Codex, and Google Antigravity.
• Hot Design Agent (Preview): AI agent that generates UI and code directly within the visual designer using prompt-driven workflows.
• Uno Toolkit & Extensions: A rich set of pre-built controls, themes, and extensions including authentication, navigation, and reactive patterns.
• Figma Integration: Export Figma designs directly to XAML or C# markup via the optional Uno Platform for Figma plugin.
• C# Markup & XAML Support: Write UI in either XAML or C# markup, with full IntelliSense and tooling support in Visual Studio, VS Code, and JetBrains Rider.
• Migration Paths: Dedicated tooling and guides for migrating from WPF, Silverlight, and Xamarin.Forms to Uno Platform.
• Community & Enterprise Support: Free community support via GitHub Discussions and Discord, with professional support contracts available for enterprise teams.

To get started, sign up for a free Community license at platform.uno, install the Uno Platform extension for Visual Studio or VS Code, and use the Template Wizard to scaffold your first cross-platform project.