Software That Integrates Tidy
For some people, the command line is terra incognita. They prefer the comfort and familiarity of a graphical user interface. A number of text and HTML editors integrate Tidy, or enable you to add Tidy to the editor as a tool.
In Windows, Tidy is integrated with the NoteTab text editor family, and the HTML-Kit and 1st Page 2000 web editors. You can also set up the popular TextPad text editor to work with Tidy. (I've posted instructions on how to do this.) There's even a graphical front-end available for Tidy, called TidyGUI. Unfortunately, TidyGUI is no longer maintaineduse it at your own risk.
On top of all that, you can download Tidy packages that integrate the software with such popular tools as vim, emacs, and FrontPage. Visit the Tidy web site for links to these packages.