Covert file format without downloading software

I came across www.zamzar.com which is an online file format conversion service.  For example, if you have a .docx file which you can't read as you don't have Microsoft Word 2007, and can't install Word Viewer due to your organization's policies, you can convert the file from .docx to .doc on www.zamzar.com and view it on your older Microsoft Word.

This converts not only document formats, but also image formats like .jpg, music formats like .mp3 and video formats like .rm.  A complete list of all formats is given here.

Currently on the free Zamzar service you can upload a maximum of 100 MB of data split between up to 5 different files. If you signup for an account with Zamzar though you can upload files up to 1 GB in size.  The pricing is like this:

Price File Size Concurrent Conversions Online Storage

Free   100 MB  5  Zero

$7 per month 200 MB  7     5 GB

$16 per month 400 MB 10   20 GB

$49 per month 1GB 15 100 GB

The name "Zamzar" is based on a character from the German author Franz Kafka's book "The Metamorphosis". In the novel Kafka describes the extraordinary story of a young man who is transformed whilst sleeping into a gigantic insect. The man's name - Gregor Samsa - was used as the basis for the company name because of its' powerful association with change & transformation.