Disclosed are examples of systems, apparatus, methods and computer program products for providing a dynamic page previewer for a web application builder. A database system maintains a multi-tenant non-relational database associated with a number of users, web applications, and web application components. The system displays a user interface for a dynamic page previewer, consisting of a preview page for a web application containing a number of web application components and one or more component toggle buttons corresponding to the components. The system then processes a user request to select a component toggle button. One or more component visibility rules associated with the component are determined, as well as a visibility state for the component. The visibility state is modified in relation to the component visibility rules, and the system presents the preview page of the web application in the user interface with the web application component being visible or not visible based on the modified visibility state.