Uno

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Uno Platform is an open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps. It allows developers to create single-codebase C#/XAML applications from any IDE, featuring Hot Reload for rapid iteration.

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At a glance

Pricing

Open Source · Freemium

Free tier

Yes

API

Skill level

Technical

About

What is uno?

Uno Platform is an open-source developer platform designed for building single-codebase .NET applications that run natively across Web, Desktop, Mobile, and Embedded systems. It leverages the WinUI 3 API surface, enabling developers to utilize their existing C# and XAML skills to target multiple platforms efficiently. The platform supports native, pixel-perfect UIs for iOS and Android, fast web applications via WebAssembly, and high-performance desktop apps on Windows, macOS, and Linux using Skia for rendering. Key features include a rich toolkit with hundreds of UI components, flexible theming options (Material, Fluent, Cupertino), and state management choices like MVVM or MVUX. Uno Platform Studio, an optional premium toolkit, enhances the development loop with Hot Design, Hot Reload for XAML and C#, and Design-to-Code functionality for exporting Figma designs to XAML or C# markup.

Best used for

Ideal for developers and software engineers who need to build native mobile, web, and desktop applications from a single codebase, and leverage existing C#/XAML skills. Especially valuable for teams looking for rapid iteration with Hot Reload and a comprehensive UI toolkit for consistent user experiences across platforms.

Common actions

build mobile apps

develop web apps

create desktop apps

write cross-platform code

accelerate app development

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Capabilities

Key features

Cross-platform native development
Single-codebase C#/XAML
Hot Reload
WinUI 3 API surface
UI controls toolkit
Figma Design-to-Code
Skia rendering

Target Audience

developersoftware engineer

Integrations

Not yet documented

Pricing & Plans

Open Source · Freemium

Free

FAQs

What platforms can I target with Uno Platform?

Uno Platform allows you to build native applications for a wide range of platforms including iOS, Android, Web (WebAssembly), Windows, macOS, and Linux. It also supports embedded systems, all from a single C#/XAML codebase.

Is Uno Platform completely free to use?

The core Uno Platform framework is free and open-source under the Apache 2.0 license. There is an optional premium toolkit called Uno Platform Studio that integrates with popular IDEs and offers advanced features like Hot Design and Design-to-Code.

How does Uno Platform handle UI rendering across different operating systems?

Uno Platform unifies cross-platform development by abstracting platform-specific implementations. It renders UI using either a Skia-based engine for consistent performance and visuals, or by translating XAML UI into native platform controls for a native look and feel.

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