By default, all software supports multiple file extensions. MKVExtractGUI-2 supports at least 1 different file extensions. The basic files that MKVExtractGUI-2 supports are .MKV3D. However, not all of the extensions listed on the list are always used to save the effects of work in MKVExtractGUI-2. Very often, files with such extensions are used as source data files used by MKVExtractGUI-2.
MKVExtractGUI-2 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 MKVExtractGUI-2 and try to save it in another file format, also supported by MKVExtractGUI-2.