By default, all software supports multiple file extensions. Visio 2010: Visio Viewer supports at least 1 different file extensions. The basic files that Visio 2010: Visio Viewer supports are .VSS. However, not all of the extensions listed on the list are always used to save the effects of work in Visio 2010: Visio Viewer. Very often, files with such extensions are used as source data files used by Visio 2010: Visio Viewer.
Visio 2010: Visio Viewer 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 Visio 2010: Visio Viewer and try to save it in another file format, also supported by Visio 2010: Visio Viewer.