The Pirate Bay has established itself as the largest BitTorrent tracker, and helps to distribute millions of files a day. Today, the Pirate Bay team adds yet another service to its arsenal, a free video converter that allows users to put their favorite movies and TV shows on almost every mobile device.

With the wide range of video formats out there, it can be quite a challenge to find a tool that can easily convert these to a format that is supported by your mobile device. The Pirate Bay, one of the greatest video libraries online, now has an application that does just this.

The ViO converter reduces AVI, MPEG, MP4, WMV and others videos to 20% of its original size without any reduction in image quality, and claims to do it faster than any other converter. The tool is completely free and comes with pre-configured settings for the most wisely used mobile devices, including the iPod, iPhone and BlackBerry.

The converter can be downloaded for free, but strangely enough a .torrent is not available. The ViO website is currently accessible at a subdomain of The Pirate Bay, complete with a nifty marketing pitch claiming that “ViO proprietary compression delivers better video quality, higher resolution and smaller file sizes, than anything else on the market today.”

When ViO is installed there is an optional toolbar that can be installed with it. The application itself is easy to use, and does indeed a good (and fast) job at converting different video files we’ve tried. If this takes off, it might even reduce the number of pirated downloads of some of the commercial alternatives.

Update: Some readers noted that ViO violates the GPL for at least 2 projects (1 and 2), The Pirate Bay will put the source online to resolve this issue.