By default, all software supports multiple file extensions. Widelands supports at least 3 different file extensions. The basic files that Widelands supports are .WRPL. However, not all of the extensions listed on the list are always used to save the effects of work in Widelands. Very often, files with such extensions are used as source data files used by Widelands.
Widelands 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 Widelands and try to save it in another file format, also supported by Widelands.