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