Microsoft Active Server Page (ASP) is a server-side scripting technology that can be used to create dynamic and interactive web applications. An ASP page is an HTML page that contains server-side scripts that are processed by a web server before being sent to the user's browser. You can combine ASP with Extensible Markup Language (XML) and Hypertext Markup Language (HTML) to create powerful interactive websites.

ASP is a feature of the Microsoft Internet Information Server. Since the server-side script is building a regular HTML page, it can be served to almost any browser. An ASP file can be created by including a script written in VBScript or JScript in an HTML file.