By default, all software supports multiple file extensions. Xj3D supports at least 2 different file extensions. The basic files that Xj3D supports are .X3D. However, not all of the extensions listed on the list are always used to save the effects of work in Xj3D. Very often, files with such extensions are used as source data files used by Xj3D.
Xj3D 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 Xj3D and try to save it in another file format, also supported by Xj3D.