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title: Latest Windows App SDK downloads
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description: This page provides links to the latest downloads of the Windows App SDK for all three release channels (stable, preview, and experimental).
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ms.topic: article
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ms.date: 10/28/2025
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ms.date: 01/13/2026
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keywords: windows, winrt, win32, windows app development, Windows App SDK
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ms.localizationpriority: medium
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@@ -43,6 +43,7 @@ For older releases, see the [Archive of Windows App SDK downloads](downloads-arc
Copy file name to clipboardExpand all lines: hub/apps/windows-app-sdk/release-channels.md
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title: Windows App SDK release channels
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description: Learn about the Experimental, Preview, and Stable release channels used to ship the latest version of the Windows App SDK.
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ms.topic: article
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ms.date: 09/22/2025
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ms.date: 01/13/2026
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keywords: windows win32, windows app development, project reunion, windows app sdk, release channels
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ms.localizationpriority: medium
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@@ -15,7 +15,7 @@ The latest version of the Windows App SDK ships via three release channels: Expe
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|**✅**|**Stable**| Production-ready channel intended for apps in market. Includes only stable, supported APIs suitable for long-term use. | No more than every six months <br/> *(plus servicing updates as needed)*| Yes |**1.8.4 (1.8.260101001)** <br/> Released: 01/13/2026 <br/> [Release notes](./release-notes/windows-app-sdk-1-8.md?pivots=stable#version-184-18260101001)|
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|**❇️**|**Preview**| Early look at the next Stable release. May introduce breaking API changes before final stabilization. | At least one preview for each Stable release | No |**1.8 Preview (1.8-preview)** <br/> Released: 08/19/2025 <br/> [Release notes](./release-notes/windows-app-sdk-1-8.md?pivots=preview#version-18-preview-18-preview)**|
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|**🔄**|**Experimental**| Early-stage features under active development. APIs may change, be removed, or never ship. Intended for exploration and feedback only. | Published as needed to gather feedback on prototypes and early designs | No |**2.0 Experimental 4 (2.0.0-experimental4)** <br/> Released: 11/11/2025 <br/> [Release notes](./release-notes/windows-app-sdk-2-0.md?pivots=experimental#version-20-experimental-3-200-experimental3)|
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|**🔄**|**Experimental**| Early-stage features under active development. APIs may change, be removed, or never ship. Intended for exploration and feedback only. | Published as needed to gather feedback on prototypes and early designs | No |**2.0 Experimental 4 (2.0.0-experimental4)** <br/> Released: 01/13/2026 <br/> [Release notes](./release-notes/windows-app-sdk-2-0.md?pivots=experimental#version-20-experimental-4-200-experimental4)|
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For a comprehensive list of all current and previous releases of the Windows App SDK, including download locations, see [Downloads for the Windows App SDK](downloads.md).
## Version 2.0 Experimental 4 (2.0.0-Experimental4)
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Released: **Jan 13, 2026** <br><br>
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<details><summary>ONNX Runtime Alignment and Execution Provider Stability</summary>
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>
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> * Windows ML experimental builds align with ONNX Runtime mainline version 1.24 to improve compatibility and stability.
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> * Stable Application Binary Interface (ABI) execution providers are enforced to ensure predictable behavior across devices, with non‑stable execution providers excluded from acquisition.
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> * Only the OpenVINO execution provider is supported, with additional execution providers to be added over time as they meet stability requirements.
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> * The size of Microsoft.Windows.AI.MachineLearning.dll was reduced by approximately 160 KB.
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>
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</details>
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<details><summary>App Content Search</summary>
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>
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> * New experimental APIs to lookup statistics of items being indexed. This provides visibility into what is happening in the index.
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> * Support for Query cancellation to allow apps to run a query and update it if there is a new query before the current one completes. This allows responding faster to the query as a user types in the query string.
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> * Prefix matching support for short strings to improve results as user is typing.
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>
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</details>
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<details><summary>Video Super Resolution Improvements</summary>
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>
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> * VideoScaler is now disposable, improving resource management and lifecycle control.
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> * The VSR model is now compiled and cached to improve performance and reduce repeated initialization costs.
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> * A capability check has been added to validate VSR support before use.
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> * Explicit WinML initialization is no longer required when using Video Super Resolution.
> * The `FlowLayout` control now uses ItemSpacing and LineSpacing terminology instead of horizontal and vertical spacing properties. The aligned naming improves clarity and consistency with modern layout patterns across UI frameworks.
> * The `WrapPanel` control now uses ItemSpacing and LineSpacing nomenclature instead of the previous horizontal and vertical spacing properties.
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</details>
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<details><summary>Custom XAML Predicates and IXamlPredicate Integration</summary>
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>
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> * Implemented the `IXamlPredicate` interface to define custom predicates that integrate seamlessly with XAML's conditional namespace syntax and are evaluated at XAML parse time.
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> * Custom predicates enable conditional XAML scenarios based on application-specific factors such as:
> * Updated packages to enable external usability, which includes changes to:
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> * Microsoft.UI.DCPP.Dependencies.Minimal
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> * Microsoft.UI.DCPP.Dependencies.Edge
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> * ExpPointerPointStatics
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> * Added build support for Visual Studio 2026
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> * Introduced tools and scripts for use by external developers to build and test WinUI.
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>
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</details>
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<details><summary>WinUI API deprecation and rename</summary>
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>
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> -[deprecated] DependencyObject.Dispatcher
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> -[deprecated] Window.Current
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> -[deprecated] FocusManager.GetFocusedElement
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> -[renamed] SystemBackdropHost to SystemBackdropElement
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</details>
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<details><summary>WinAI API Namespace rename</summary>
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>
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> -[renamed]`Microsoft.Windows.AI.Search.Experimental.AppContentIndex` to `Microsoft.Windows.Search.AppContentIndex`
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</details>
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<details><summary>Bug fixes</summary>
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>
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> * Fixed “Class not registered” errors when using self-contained deployment with Windows ML. Developers using self-contained deployment no longer need to register all the Foundation package activatable classes that were used internally.
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> * Fixed a potential crash occurring on process shutdown when using Windows ML.
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> * Fixed the `ImageForegroundExtractor` API routing path so calls reach the correct endpoint.
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> * Ensured execution provider install and download progress is correctly forwarded to apps during package deployment.
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> * Fixed a crash in `SystemBackdrop` when the target disconnects by guarding invalid disconnection paths.
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> * Fixed an issue that prevented Windows AI APIs from being available for some applications.
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</details>
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<details><summary>New or updated APIs</summary>
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>
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> This release includes the following new and modified experimental APIs compared to 2.0.0-experimental3:
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>
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> ```
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> Microsoft.UI.Content
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>
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> ChildSiteLink
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> IsHitTestVisible
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> ```
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> ```
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> Microsoft.UI.Xaml.Controls
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>
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> FlowLayout
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> LineSpacing
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> LineSpacingProperty
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> MinItemSpacing
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> MinItemSpacingProperty
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>
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> SystemBackdropElement
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> WrapPanel
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> ItemSpacing
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> ItemSpacingProperty
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> ItemsStretch
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> ItemsStretchProperty
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> LineSpacing
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> LineSpacingProperty
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>
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> WrapPanelItemsStretch
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> ```
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> ```
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> Microsoft.UI.Xaml.Markup
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>
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> IXamlPredicate
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> ```
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> ```
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> Microsoft.Windows.AI.Video
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>
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> VideoScaler
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> Dispose
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> ```
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> ```
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> Microsoft.Windows.Search.AppContentIndex
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>
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> AppContentIndexContract
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> AppContentIndexer
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> AppContentIndexListener
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> AppIndexContentRegion
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> AppIndexImageQuery
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> AppIndexImageQuerySession
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> AppIndexQueryMatch
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> AppIndexTextQuery
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> AppIndexTextQuerySession
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> AppIndexTextStreamEncoding
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> AppManagedImageQueryMatch
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> AppManagedIndexableAppContent
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> AppManagedTextQueryMatch
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> ContentItemErrorDetail
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> ContentItemReader
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> ContentItemReindexingStatus
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> ContentItemStatus
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> ContentItemStatusResult
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> ContentRegionTextOptions
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> DeleteIndexResult
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> DeleteIndexStatus
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> DeleteIndexWhileInUseBehavior
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> GetOrCreateIndexOptions
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> GetOrCreateIndexResult
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> GetOrCreateIndexStatus
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> ImageQueryMatch
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> ImageQueryOptions
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> ImageQuerySessionResult
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> IndexableAppContent
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> IndexCapabilities
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> IndexCapabilitiesOfCurrentSystem
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> IndexCapability
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> IndexCapabilityInitializationStatus
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> IndexCapabilityLanguageStatus
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> IndexCapabilityOfCurrentSystemStatus
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> IndexCapabilityRequirement
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> IndexCapabilityState
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> IndexStatistics
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> QueryMatchContentKind
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> QueryMatchScope
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> RegionContentKind
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> TextLexicalMatchType
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> TextQueryMatch
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> TextQueryOptions
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> TextQuerySessionResult
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> ```
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>
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</details>
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## Version 2.0 Experimental 3 (2.0.0-Experimental3)
> * Fixed bounding box calculation when text is rotated. In some circumstances, the OCR text matching within images reported inaccurate or empty region bounds when the text was rotated.
If you previously installed Windows App SDK 2.0 Experimental 1, follow the [NuGet Uninstall](/nuget/consume-packages/install-use-packages-visual-studio#uninstall-a-package) guide to remove the `Microsoft.WindowsAppSDK` NuGet Metapackage with version `2.0.250930001-experimental1` from your project and the associated WinAppSDK component packages from that release before trying this new version, since the previously released Experimental package has a higher version number than the current one.
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> [!IMPORTANT]
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> If you previously installed Windows App SDK 2.0 Experimental 1, follow the [NuGet Uninstall](/nuget/consume-packages/install-use-packages-visual-studio#uninstall-a-package) guide to remove the `Microsoft.WindowsAppSDK` NuGet Metapackage with version `2.0.250930001-experimental1` from your project and the associated WinAppSDK component packages from that release before trying this new version, since the previously released Experimental package has a higher version number than the current one.
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