A web page preview system comprising a web host for providing, in a run-time environment, a first version and a second version of a set of web pages and an interface for receiving requests from users for access to the different versions of the set of web pages. The system provides access to the first version of the set of web pages in the run-time environment to a general set of users and provides access to the second version of the set of web pages in the run-time environment to a restricted sub-set of users, so that the second version of the set of web pages may be previewed in the run-time environment by the restricted sub-set of users.