A method, system and computer-usable medium are disclosed for managing the spatial coordinates and visual attributes of objects within a user interface (UI). A Web UI ruler is executed within a UI comprising a plurality of objects. A first object and second object are selected. The Web UI Ruler then collects the spatial coordinate and visual attribute values for the first and second object and their relationship values are determined. The spatial coordinate and visual attribute values for the first and second objects, along with their corresponding relationship values, are modified and the modifications are applied to the target objects. The values are then stored in the Web UI ruler. These values can then be subsequently applied to one or more target objects. Alternatively, the stored values are exported as a cascading style sheet (CSS) class, which can then likewise be subsequently applied to one or more target objects.