By default, all software supports multiple file extensions. iTunes supports at least 64 different file extensions. The basic files that iTunes supports are .MP4. However, not all of the extensions listed on the list are always used to save the effects of work in iTunes. Very often, files with such extensions are used as source data files used by iTunes.
iTunes 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 iTunes and try to save it in another file format, also supported by iTunes.