On which platforms does Microsoft Silverlight run

End of support for Silverlight

Microsoft Silverlight will reach end of support on October 12, 2021. The Silverlight development framework is currently only available on Internet Explorer 10 and Internet Explorer 11, with Internet Explorer 10 support ending on January 31, 2020. Chrome, Firefox or browsers using the MAC operating system are no longer supported.

frequently asked Questions

What level of support does Microsoft currently offer for Silverlight?

Microsoft only provides technical support for customers with Silverlight 5 versions. Paid technical support is available for customers whose problems extend beyond installing and upgrading. Microsoft will continue to provide updates to the Silverlight 5 Developer Runtime for supported browser versions (and their extension models support plug-ins). This also includes updates for security risks identified by the Microsoft Security Response Center (MSRC).

Silverlight 5 supports the browser versions listed on the System Requirements page through October 12, 2021, or the lifecycle of the underlying browsers, whichever is shorter. The support page will be updated to reflect compatibility with newer browsers and operating system versions.

Support for Windows 7 will expire on January 14, 2020. Is Silverlight supported as part of the Extended Security Update (ESU) program available to Windows 7 customers?

The Silverlight lifecycle policy is separate from the Windows 7 policy. After January 14, 2020, customers using Silverlight on Windows 7 will no longer be supported and will no longer receive automatic security updates.

What will happen on October 12, 2021? Are existing applications no longer working?

Microsoft is not planning any specific actions to terminate Silverlight applications. However, after that date, Silverlight will be in an unsupported state and will not receive any future quality or security updates.

Are companies legally allowed to continue running Silverlight resources after October 12, 2021? What happens to the license to use Silverlight after October 12, 2021?

The Silverlight license is a perpetual license and is not tied to continued support. While support ends in October 2021, this date will not affect the license, which will remain in effect as long as the customer uses the software and meets the terms of the license agreement.

Can companies get a custom agreement to extend Microsoft support beyond 2021?

There are no plans to expand Silverlight support beyond the support dates listed here.

What happens to the Microsoft.com/silverlight website after October 12, 2021?

The microsoft.com/silverlight website is still available. However, the Silverlight installer will no longer be available after support expires on October 12, 2021.

What is the recommended technology / development framework for customers looking to migrate applications from Silverlight?

There are several options for migrating applications from Silverlight. We recommend that you evaluate the needs of the application being migrated and identify the technology that is best suited for the particular application:

  • If your application is not browser dependent and you want to migrate to a Windows desktop application, it is recommended that you migrate the application to UWP or WPF on .NET Core.

  • If it is a web-based application, we recommend that you are in Blazer, which enables .NET Silverlight code reusability. Blazer lets you create interactive web user interfaces using C # instead of JavaScript. Blazer apps are made up of reusable components of web user interfaces implemented using C #, HTML, and CSS. Both the client and server code are written in C # and thus enable code and libraries to be shared.