The site, which was created by Clusta, doubles up as a social networking site to allow fans to interact with the group. It goes live with the launch of The Saturdays second album on October 12.
Other features of the site include profile pages on each member where they offer fashion tips to fans.
Polydor is looking to create sponsor tie-ups with fashion brands for this part of the site.
Site members can add in their own content, create diary calendars, write gig reviews and contact other fans.
Aaron Bogucki, senior digital campaign manager at Polydor, said: "With the success of the first album we wanted to make sure our digital strategy led the launch of the second so we decided to launch a fan networking site.
"The site will continue to provide free entertainment in the form of videos and music. Clusta's digital platform also means that we can regularly use Frankie's, Rochelle's, Una's, Mollie's and Vanessa's content to engage with their fans."
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