Install Classic ASP on IIS

Last updated: August 26, 2026.

Classic ASP is an optional IIS application-development feature. Enable only the IIS modules required by the application.

Windows client

Open Windows Features, then select Internet Information Services → World Wide Web Services → Application Development Features → ASP. IIS also enables the required ISAPI extensions.

Windows Server PowerShell

Install-WindowsFeature Web-Server, Web-ASP, Web-ISAPI-Ext, Web-Filtering -IncludeManagementTools

Test the installation

<%@ Language="VBScript" %>
<% Response.Write "Classic ASP is running." %>

Place the test in an IIS site and browse it through HTTP. Remove diagnostic pages afterward and keep detailed errors disabled for remote production requests. Microsoft documents the IIS ASP module.