Web Platform Installer

{{Cleanup rewrite|date=January 2024}}

{{Infobox software

| name = Web Platform Installer

| logo =

| screenshot = Web Platform Installer screenshot.png

| caption =

| collapsible =

| author =

| developer = Microsoft

| released = {{Start date|2009|01|21}}[http://blogs.iis.net/bills/archive/2009/01/21/microsoft-web-platform-installer-v1-0-released.aspx Microsoft Web Platform Installer v1.0 Released! : BillS IIS Blog : The Official Microsoft IIS Site]. Blogs.iis.net. Retrieved on 2015-02-06.

| discontinued = yes

| latest release version = 5.0

| latest release date = {{Start date and age|2013|02|14}}

| latest preview version =

| latest preview date =

| programming language =

| operating system = Windows XP SP3 and later
Windows Server 2003 SP2 and later

| platform = x86-64, IA-32

| size = 4.5 MB

| language = English, German, Japanese, French, Spanish, Italian, Korean, Chinese Traditional, Chinese Simplified, Czech, Polish, Portuguese-Brazil, Russian, Turkish

| language count = 14

| language footnote = {{cite web|title=Microsoft Web Platform Installer 5.0|url=http://www.microsoft.com/web/downloads/platform.aspx|website=microsoft.com|publisher=Microsoft|access-date=27 July 2015}}

| genre = Package management system

| license = Freeware

| alexa =

| repo =

}}

Web Platform Installer (Web PI) was a freeware, closed-source package management system that installs non-commercial development tools and their dependencies that are part of Microsoft Web Platform, including:

• Internet Information Services
• WebMatrix
• Visual Web Developer Express Edition
• Microsoft SQL Server Express Edition
• .NET Framework
• Silverlight Tools for Visual Studio
• PHP
• WordPress
• Umbraco
• Drupal
• Joomla!
• Orchard

The ability to install third-party software was added in version 2.0, released September 24, 2009.[http://www.microsoft.com/web/ Free Web Development Tools for Windows | Microsoft WebMatrix 3]. Microsoft.com. Retrieved on 2015-02-06. {{As of|July 2015}}, Web PI can install 82 titles.[http://www.microsoft.com/web/gallery/ Windows Web App Gallery - Featured Apps]. Microsoft.com. Retrieved on 2015-02-06. Web PI 2.0's options are populated dynamically at runtime from Microsoft's servers, allowing installation options to be updated without the need to download newer versions of the Web PI itself.[http://www.microsoft.com/web/Downloads/platform.aspx Download the Microsoft Web Platform]. Microsoft.com (2013-02-14). Retrieved on 2015-02-06.

On July 7, 2010, Microsoft announced Web PI 3 which includes WebMatrix, a new set of integrated tools for web development. Web PI 3 installs additional tools for web development including IIS Developer Express, SQL Server Compact and DotNetNuke.

Web PI features an offline mode where products can be downloaded to a local cache on a machine where internet access is available and then use these cached files on a different machine later.[https://docs.microsoft.com/en-us/iis/install/web-platform-installer/web-platform-installer-v4-command-line-webpicmdexe-rtw-release Web Platform Installer v5 Command Line (WebPICMD.exe) - RTW release : The Official Microsoft IIS Site]. Iis.net (2012-08-26). Retrieved on 2018-12-18. However, Web PI is still not usable in environments where Internet connectivity and local administrator privileges are mutually exclusive (i.e. a given process can either authenticate through a transparent proxy, or can have High or System integrity level, but not both).

The Microsoft Web Platform Installer (WebPI) has been retired since July 1, 2022.{{cite web |url=https://blogs.iis.net/iisteam/web-platform-installer-end-of-support-feed|title=Web Platform Installer - End of support and sunsetting the product/application feed|author= |date=June 8, 2021|website=IIS Team Blog|publisher=Microsoft|access-date= |quote=}}