ReStuff is brought to you by joshua stein and is now powered by the excellent Infinite Mac software by Mihai Parparita.
ReStuff will automatically convert uploaded StuffIt 5+ archives into StuffIt 3 format and present them to you for download. Just drag-and-drop archives (or click Upload File(s) below the screen) and click the button in the Mac window to start the conversion. Once completed, your browser will prompt you to save the resulting files.