File type: ASP.NET Source
The .aspx file extension is an ASP.NET Source File. It pertains to Web pages and source files created using the ASP.Net Framework application.
The said program is a component of the .Net technology of Microsoft and is employed in creating rich and dynamic content for Web pages that allow the execution of embedded scripts at a rate much faster than any other online server. Web pages with the .aspx could be opened or viewed using any Web browser operated by Mac or Microsoft systems.
This is because the execution of all the scripts in the .aspx Web page is made on the server. The browser is therefore enabled to display Web page as a plain HTML.