# IISpeed

> IISpeed is a PageSpeed optimization module for Microsoft IIS, developed by We-Amp B.V. Its IIS integration is now maintained in mod_pagespeed, which includes a native IIS port.

## Status

IISpeed's IIS integration is now maintained in mod_pagespeed. IISpeed itself no longer receives updates: no new features, bug fixes or security patches. Existing installations keep working, there is no hard cutoff date, and we still answer questions about IISpeed. Fixes, including security fixes, go into the mod_pagespeed IIS module and reach IIS users through its published installers; the current one is 2.5.2, on the module's GitHub release (https://github.com/We-Amp/mod_pagespeed/releases/download/module-v2.5.2/pagespeed-iis-2.5.2-win-x64.msi). Existing licenses transfer at no cost through the license-transfer form: https://modpagespeed.com/contact/?topic=iispeed-transfer

## Key Pages

- [Home](https://iispeed.com/): Transition announcement and FAQ
- [Download](https://iispeed.com/download/): Where to get the installer (mod_pagespeed IIS MSI)
- [Buy](https://iispeed.com/buy/): New sales are closed; how to transfer an existing license (nothing to purchase)
- [Install](https://iispeed.com/install/): Installer overview for IIS
- [Pricing](https://iispeed.com/pricing/): Free to run under Apache-2.0; free-transfer policy and support plans
- [Documentation](https://modpagespeed.com/docs/): Full IISpeed documentation
- [FAQ](https://iispeed.com/faq/): Frequently asked questions
- [Support](https://iispeed.com/support/): Contact and known issues
- [About](https://iispeed.com/about/): What IISpeed was and how it relates to mod_pagespeed

## Guides

- [Migrating from IISpeed](https://iispeed.com/iispeed-migration/): Step-by-step move from an IISpeed install to the mod_pagespeed IIS installer, with verification and rollback
- [IIS Core Web Vitals in 2026](https://iispeed.com/iis-core-web-vitals-2026/): What to measure and which optimizations move LCP, CLS and INP on IIS
- [IIS image optimization](https://iispeed.com/iis-image-optimization/): WebP and AVIF on classic IIS and on ASP.NET Core
- [ASP.NET Core on IIS](https://iispeed.com/aspnet-core-iis-performance/): Where the WeAmp.PageSpeed.AspNetCore middleware fits behind the IIS ASP.NET Core Module

## Availability

- mod_pagespeed for IIS. The current IIS installer is mod_pagespeed 2.5.2, on the module's GitHub release. Free license transfer for IISpeed customers.
- mod_pagespeed is also available as [native ASP.NET Core middleware](https://modpagespeed.com/docs/aspnet-getting-started/), or on nginx and Apache.

## Related

- [mod_pagespeed](https://modpagespeed.com): Server-side PageSpeed optimization for IIS, nginx and Apache, C++23
- [We-Amp](https://we-amp.com): The company behind IISpeed