You can convert PDFs to Excel files, huge TIFF images to PDF, icon files into images, and the site even does a little OCR work on certain image-to-text conversions, and the results were comparable with PDF to Word Converter. But the simple-to-use site also can take almost any file type that's lost an extension and tell you what kind it is, as well as compare two different text or document files and return the text lines where they're different. It can pull the ID3 tags off an MP3, convert an HTML file into an RSS feed, and, well, hit the "FAQ" tab below to see what else it can do.

http://www.cometdocs.com/