By default, all software supports multiple file extensions. FastCGI supports at least 2 different file extensions. The basic files that FastCGI supports are .FCGI. However, not all of the extensions listed on the list are always used to save the effects of work in FastCGI. Very often, files with such extensions are used as source data files used by FastCGI.
FastCGI 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 FastCGI and try to save it in another file format, also supported by FastCGI.