By default, all software supports multiple file extensions. ASP.NET supports at least 12 different file extensions. The basic files that ASP.NET supports are .ASPX. However, not all of the extensions listed on the list are always used to save the effects of work in ASP.NET. Very often, files with such extensions are used as source data files used by ASP.NET.
ASP.NET can be used to convert file formats between the file extensions listed below. You can open a file with one of the file extensions below via ASP.NET and try to save it in another file format, also supported by ASP.NET.