By default, all software supports multiple file extensions. iWork Keynote supports at least 8 different file extensions. The basic files that iWork Keynote supports are .PPTX. However, not all of the extensions listed on the list are always used to save the effects of work in iWork Keynote. Very often, files with such extensions are used as source data files used by iWork Keynote.
iWork Keynote 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 iWork Keynote and try to save it in another file format, also supported by iWork Keynote.