At launch, ITV.com will include several revamped sections, although the majority of updates will be rolled out weekly between now and the end of July.
The relaunch will include an option for viewers to view content for up to 30 days after it is broadcast on TV, although this will only be available in certain genres to begin with.
The video-on-demand service is similar to Channel 4's 4degD, which launched in November 2006. ITV is aiming to cash in on putting its footage online by selling video advertising around the content.