Download IIS Extensions

IIS is built on an open and modular architecture that allows you customize and add new features through free IIS Extensions. We are constantly adding new features to IIS to help you optimize your website for search, serve media to multiple platforms and devices, deploy web applications, route URL requests and more!

  • Latest Extensions
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Web Farm Framework

The Microsoft Web Farm Framework (WFF) 2.0 for IIS 7 simplifies the provisioning, scaling, and management of multiple servers for administrators and hosting providers. Administrators can seamlessly provision multiple servers, deploy content to them, and use them to enable elastic scaling. Using the Web Farm Framework, you can also run operations on a server (or a server farm) through a unified interface that also provides up-to-date status of server farm provisioning and health.

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WinCache Extension 1.1 for PHP

Windows Cache Extension for PHP is a PHP accelerator that is used to increase the speed of PHP applications running on Windows and Windows Server. Once the Windows Cache Extension for PHP is enabled and loaded by the PHP engine, PHP applications can take advantage of the functionality without any code modifications.

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URL Rewrite

IIS URL Rewrite 2.0 enables Web administrators to create powerful rules to implement URLs that are easier for users to remember and easier for search engines to find.

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FastCGI for IIS

The FastCGI Extension for IIS enables popular application frameworks that support FastCGI protocol to be hosted on the IIS web server in a high-performance and reliable way. FastCGI provides a high-performance alternative to the Common Gateway Interface (CGI), which has been supported by IIS since it's first release.