Diff Doc is a tool for comparing your PDF, RTF, Text, HTML, XML, DOCX, PPT or others files. It sports a dual pane interface, which allows you to visually check the differences between 2 files. To do this, simply upload your file and click "refresh" or press F5. It integrates with Windows Explorer to give you easy access to your records.
Diff Doc supports the use of the command line and can generate different types of reports to give you detailed information.