By default, all software supports multiple file extensions. FreeSurfer supports at least 1 different file extensions. The basic files that FreeSurfer supports are .STATS. However, not all of the extensions listed on the list are always used to save the effects of work in FreeSurfer. Very often, files with such extensions are used as source data files used by FreeSurfer.
FreeSurfer 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 FreeSurfer and try to save it in another file format, also supported by FreeSurfer.