The website will offer 30,000 pages of news, current information and tournament history, as well as the facility for users to upload photos to the portal's fan section. Audio and video content is also available, with UEFA offering highlights and live streaming of matches, on either subscription or pay-per-view packages via the site.
David Farrelly, head of web and content at UEFA, said the site would incorporate social networking, by giving users the chance to customise the site according to their team or location.
The website's official sponsors include Adidas, Canon, Coca-Cola and JVC.
Last month, UEFA announced that it would be seeking new sponsors for its annual Champions' League tournament.