# unoplatform/uno

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

Repository: https://github.com/unoplatform/uno
Canonical: https://ross.abutalabs.com/products/uno
Homepage: https://platform.uno
Language: C#
License: Apache-2.0
License Family: permissive
Topics: uno, uwp, android, uno-platform, roslyn, xamarin, webassembly, windows, mvvm, wasm, mono, xaml, cross-platform, csharp, macos, c-sharp, winui, linux, dotnet, hacktoberfest
Last push: 2026-08-27T00:07:02+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 3040, "days_push": 7, "days_rel": 27, "gap_med": 13, "n_releases_24m": 34}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 10019, forks 878 (observed 2026-08-28T04:10:39.275707+00:00)

## What it is
Uno Platform is an open-source (Apache-2.0) .NET framework for building native mobile, web, desktop, and embedded applications from a single C#/XAML codebase using the WinUI 3 API surface. It includes UI controls, themes, Hot Reload, and AI-powered tooling (MCPs, visual designer) for modern .NET workflows.

## Use cases
- build a cross-platform app from one c# codebase
- reuse winui xaml skills to target ios android and web
- create a webassembly app in c#
- build a desktop app for windows mac and linux with .net
- port an existing winui library to mobile and web
- design ui in figma and import to xaml
- develop embedded linux applications with c# and xaml

## When to choose
- your team knows C# and XAML and wants one codebase across mobile, web, desktop, and embedded
- you want WinUI 3 API compatibility with pixel-perfect rendering via Skia
- you need enterprise-grade, actively maintained cross-platform .NET tooling with Hot Reload and AI-assisted design

## When to avoid
- you prefer native platform languages like Swift or Kotlin for maximum platform fidelity
- you need a lightweight JavaScript/TypeScript web-only framework
- you want a fully free toolchain including all AI Studio features, since some Studio tooling is commercial

## Facets
- artifact type: framework
- maturity: active
- function: frontend-framework, ui-components, mobile-framework, desktop-framework, templating, state-management, developer-tools
- domain: cross-platform, web-development, frontend, mobile-development, desktop-applications, developer-tools
- platform: cross-platform, windows, wasm, dotnet, cpp
- tags: xaml, winui, csharp, skia, hot-reload, mvvm, webassembly, single-codebase, figma-to-xaml, ai-tools, android, ios, macos, linux

## Member repositories
- unoplatform/uno (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:39.275707+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:19:55.951451+00:00, confidence not recorded.
  - readme: https://github.com/unoplatform/uno (fetched 2026-08-28T04:10:39.275707+00:00, sha 6414bc934701)
  - homepage: https://platform.uno (fetched 2026-08-29T08:20:08.297580+00:00, sha 0aa601eae9e1)
  - site_page: https://platform.uno/docs/articles/intro.html (fetched 2026-08-29T08:20:08.300169+00:00, sha 45692a9e1ad1)
  - site_page: https://platform.uno/about-us (fetched 2026-08-29T08:20:08.303893+00:00, sha 2cfd903269b2)
  - site_page: https://platform.uno/select-subscription (fetched 2026-08-29T08:20:08.301967+00:00, sha a137df744c90)
  - site_page: https://aka.platform.uno/tech-bites (fetched 2026-08-29T08:20:08.305581+00:00, sha 46fe54373dd4)
- Data as of 2026-08-30T08:39:29.467469+00:00.