praeclarum/Ooui

Health v2 · maintenance only

Adoption not part of the score

1621 stars · 164 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Ooui is a small cross-platform UI library for .NET that lets developers build web UIs using classic object-oriented C# code, with the browser acting as a dumb renderer controlled over WebSockets. It includes ASP.NET Core integration, a Xamarin.Forms backend, and a WebAssembly packaging option.

Use cases

• build web apps in c# without writing javascript
• create interactive ui with native-style code
• run xamarin.forms apps in the browser via webassembly
• serve collaborative real-time ui over websockets
• integrate dotnet ui into asp.net core apps

When to choose

• you are a .NET developer who wants web UIs without JavaScript
• you want to reuse Xamarin.Forms-style code in the browser
• you need simple server-driven real-time UI over websockets

When to avoid

• you need a modern, actively maintained framework with a large ecosystem
• you want fine-grained control over frontend rendering or SPA tooling
• you need high-performance client-side interactivity without server round-trips

Facets

library · maturity maintenance

ui-components web-framework websocket ssr web-development frontend cross-platform dotnet browser wasm csharp xamarin-forms aspnet-core object-oriented-ui html web-server

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