The station is looking to add to its 550,000 weekly listeners through other online platforms. This follows the announcement that Channel 4 has abandoned its DAB plans, raising questions about the future of the format.
The identity overhaul and website redesign will be carried out by branding agency Blacksheep. The website will feature more content relating to the 'wider rock music world'.
In June, GCap Media sold Planet Rock to a consortium that included 70s rock musicians Tony Iommi, of Black Sabbath, and Jethro Tull's Ian Anderson.