By default, all software supports multiple file extensions. ID2Q (InDesign to Quark) supports at least 2 different file extensions. The basic files that ID2Q (InDesign to Quark) supports are .INDD. However, not all of the extensions listed on the list are always used to save the effects of work in ID2Q (InDesign to Quark). Very often, files with such extensions are used as source data files used by ID2Q (InDesign to Quark).
ID2Q (InDesign to Quark) 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 ID2Q (InDesign to Quark) and try to save it in another file format, also supported by ID2Q (InDesign to Quark).