Notepad saves a file in .txt format. By using Print to PDF and Save As options, you can save it as PDF and HTML in Windows 11/10.

To export InDesign document (INDD) in Word, you can convert InDesign file to PDF and then to Word, or export InDesign file as Rich text Format.

Ted Landau laments the lack of full support for Rich Text Format (RTF) files on his iPad.