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The cross-platform .NET UI framework

What's new in Avalonia 12: performance, stability, and platform maturity, built for what's next.

Avalonia 11

Avalonia 12

0 fps

1,867% faster

Performance

Rendering that scales to massive visual trees

Avalonia 12.0 delivers up to 1,867% increase in FPS on complex layouts, tested against scenes with 350,000 unique visual elements. These gains are the result of significant investment in the rendering pipeline, including deferred composition and optimised dirty-rect tracking.

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Android

Re-architected from the ground up

The Android backend in Avalonia 12.0 has been completely rebuilt. Reliable scheduling at high refresh rates, native support for multiple Android activities, and a streamlined rendering pipeline deliver measurably faster startup, smoother scrolling, and less animation jank.

Android documentation

Android performance · v11 vs v12

Startup time(NativeAOT)4× faster

v11

1960 ms

v12

460 ms

Scroll FPS3× smoother

v11

42 fps

v12

120 fps

Animation FPS60 FPS target

v11

49 fps

v12

60 fps

Idle CPU usage20× lower

v11

0.20 %

v12

<0.01 %

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Mobile

Navigation controls

Avalonia 12.0 brings navigation patterns designed for touch-first experiences on iOS and Android. Drawer navigation, tab bars, bottom sheets, and platform-native gesture handling work consistently across both platforms, giving your mobile users the interaction model they expect.

Documentation

WebView

WebView, now open source

The Avalonia WebView component, previously a commercial add-on, is now fully open source and included in v12. It leverages each platform's native web renderer so your applications stay compact and performant, with no bundled Chromium required. Bi-directional JavaScript interop, OAuth flow support, and full environment customisation come built in across Windows, macOS, Linux, iOS, and Android.

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Avalonia WebView control showing a web page with the Avalonia website on it

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[email protected]

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Daily

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Accessibility

Built-in accessibility across every platform

Avalonia 12.0 includes full keyboard navigation, screen reader support via platform accessibility APIs, and semantic UI controls across Windows, macOS, Linux, iOS, and Android. These capabilities are built into the framework, not layered on after the fact.

Learn more

Linux

Native Wayland support for modern Linux New in 12.1

Avalonia 12.1 delivers native Wayland support, giving your Linux applications direct access to the display protocol that powers GNOME, KDE Plasma, and other modern compositors. Rendering through Wayland’s buffer-sharing model brings lower latency and better HiDPI handling, while X11 remains fully supported for older desktops and distributions.

Linux documentation

Screenshot of Avalonia documentation showing an interactive XAML editor with a live preview of a button control

Education

Expanded docs and interactive examples

The Avalonia 12.0 documentation includes 125% more guides compared to 11.x, a rebuilt API reference, and interactive XAML editors embedded directly in the pages. Whether you’re evaluating the framework or debugging a layout issue, the reference material is structured to get you to an answer quickly.

Read the docs

Momentum

Naturally grown into the standard

Avalonia didn't get here through hype. It grew because developers kept choosing it, project after project, team after team.

MIT licensed, commercially backed

The full framework is MIT licensed with no usage restrictions. AvaloniaUI provides commercial support plans and long-term maintenance for teams that need it.

The most popular .NET UI framework

Avalonia has grown to become the most popular and most starred .NET UI framework: driven by word of mouth, not marketing spend.

One singular mission

We do one thing: build the best cross-platform .NET UI framework. Every engineering decision, every release, every partnership is in service of that goal.

Pull request history

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total

Engineering depth and platform momentum

The pull request history shows the pace of engineering investment behind every release. Avalonia 12 lands a rebuilt Android backend, strengthened iOS and Mac Catalyst integration, and native Wayland support, and all of it happens in the open.

MIT licensed

Built on open source, trusted in production

Avalonia is used in production by teams at organisations including Autodesk, JetBrains, and Devolutions. The framework is MIT-licensed and commercially backed by AvaloniaUI: the engineers who build it support it directly through Avalonia Enterprise. It’s maintained with a growing open-source community, with contributions from Microsoft, JetBrains, Stripe, and Avanade.

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Start building with Avalonia 12

One .NET codebase across Windows, macOS, Linux, iOS, Android, and WebAssembly. Get started in minutes with the IDE you already use.

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