Microsoft Supported & Community Downloads for IIS...

Microsoft downloads are fully supported with future updates, bug fixes and customer support. Community downloads are submitted by IIS community members and do not benefit from Microsoft approval or support, and should be downloaded with this in mind.

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Most Microsoft Downloads can be installed using Web Platform Installer however it is not required.

All Microsoft Supported Downloads

WinCache Extension for PHP

Published on 06/20/2010 by Microsoft


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.

Application Initialization Module for IIS 7.5

Published by Microsoft


IIS Application Initialization for IIS 7.5 enables website administrators to improve the responsiveness of their Web sites by loading the Web applications before the first request arrives. By proactively loading and initializing all the dependencies such as database connections, compilation of ASP.NET code, and loading of modules, IT Professionals can ensure their Web sites are responsive at all times even if their Web sites use a custom request pipeline or if the Application Pool is recycled...

Application Request Routing

Published by Microsoft


IIS Application Request Routing (ARR) 3 enables Web server administrators, hosting providers, and Content Delivery Networks (CDNs) to increase Web application scalability and reliability through rule-based routing, client and host name affinity, load balancing of HTTP server requests, and distributed disk caching. With ARR, administrators can optimize resource utilization for application servers to reduce management costs for Web server farms and shared hosting environments.

All Community Contributed Downloads

ISAPI SCGI extension

Published on 12/27/2014 by apn


The ISAPI SCGI extension adds support for the Simple Common Gateway Interface protocol to IIS. SCGI is a standard for communicating between web servers and application servers on the back end offering similar benefits to FastCGI but significantly simpler.

PageSpeed Optimization powered by Google's official SDK

Published on 05/16/2013 by oschaaf


PageSpeed optimization module powered by Google's official PageSpeed optimization libraries. Speedy and optimized web pages help maximize visitor engagement, retention, and conversions. Google's PageSpeed platform offers insights, recommendations, and tools to automatically comply with best practices from the web performance optimization industry. Optimizes the output and PageSpeed grade of any IIS system, including static content, ASP.NET, PHP, ColdFusion, and Application Request Routing. Ca...

Aptimize Website Accelerator

Published on 04/16/2010 by aptimize


The world’s biggest companies trust Aptimize to accelerate their websites and intranets. Aptimize Website Accelerator is an ISAPI filter for Microsoft IIS that automates performance tuning by dynamically optimizing web pages for high performance at runtime – just before a page is sent from web server to browser. Aptimize helps you reduce page load times by up to 75%.