Here is an interesting website which is able to convert a variety of file formats online. You can input the link/url to the file, select to which format the conversion is to be carried out anf Bingo! You can also provide an email address to which the converted file will automatically be delivered. File sizes up to 100 MB is supported.

The Supported formats include:

Documents: csv, doc, html, pdf, ppt, xml, xls

Images: JPG, BMP, PNG, GIF, TGA, TIFF, ICO

Video : 3gp, avi, flv, mov, mpg, wmv, mp4, rm

Audio : mp3, ogg, wav, wma, flac, ram, ac3, aac

You can also use Zamzar to convert and save videos from the following popular video-sharing websites:

• Youtube
• Google Video
• Myspace
• Revver
• PutFile
• Break.com
• Apple Trailers
• Dailymotion
• Metacafe
• IFilm
• Grouper
• Blip.tv

Video Demo

For Uploading the files from your computer use the homepage and if you have a url of the file use the url version.