Active Local Pages (ALP) is an engine that extends the Internet Explorer browser with the ability to execute ASP pages and CGI applications locally without the need of a Web server or network configured on the machine. Through the ALPFrame viewer, ALP extends the DHTML object model with window and context menus controlled by the pages. Additionally, ALPFrame viewer supports features that allow it to run ALP without the need of installation and ALP ActiveX components registration. By extending the browser with support for server side technologies, ALP makes Web server programming techniques available for desktop applications development.

Version 1.1 is much more compatible with the ASP in MS Internet Information Server, its run-time library now contains components without equivalents such as COM Thread, COM Apartment, and Composite objects.