You’ve probably heard of this, but for those of you who have not, Zamzar is a free online service that helps you convert a file from a format to another. What makes Zamzar stand out from the rest of these free conversion site is a number of different formats they provide.
Supported formats in Zamzar
I guess they pretty much covers every general formats we can think of. Conversion from one format to another is very easy in zamzar. Browse to your file (URL supported), select desired format, enter email address to receive the converted format and start converting.