Zamzar

One of my favorite free (I love free) tools to handle the common occurrence of having a file in one format when you really need it in another.  Instead of installing a half-dozen tools on my system, and remembering which one does what, I use Zamzar, which does a very nice job.

Among the most used by me is converting PDF to DOC, TIFF to JPG, MOV to MP4 and AVI to MP4.

http://www.zamzar.com/