When you save an HTML web page from a Microsoft Word document, the Office engine adds tons of proprietary HTML tags and CSS styles (like class=MsoNormal or style=’mso-no-proof:yes’) to the exported HTML file.

With WordOff, you can quickly remove all the invalid or proprietary tags from the Word HTML (or any other WYSIWYG editor) and you can then use the cleaned file in email newsletters, ebooks or even your rich-text emails.

Wordoff is written in Python and runs on Django in Google App Engine. It is open-source and you may grab the code from Github.