WordDocDiff (WDD) is a file/directory-comparison program. The comparing of Microsoft Word/Excel/PDF and WordPerfect, HTML, RTF, and TXT files is encountered often in all industries, making WDD a very worthwhile tool. Create reports in Word, HTML, text, or comma-delimited files. Display differences in one of two views, Side By Side or All In One. Also, you can run this application from the command line, allowing you to extend the functionality of existing applications.