BGR's 3D web viewer allows for a visualisation of the its produced 3D subsurface models from various perspectives and camera positions by using only a web browser. Each of the geologic horizons of a model can be separately switched on and off. The information belonging to a horizon can be queried by clicking with the mouse on the displayed object. The user can chose which model data are to be exported, thereby loading the data to the own computer. Predefined camera positions give a quick access to the visualisation of a model. The web application offers essential tools to explore the 3D model such as rotation, zoom and panning functions, or adjustment of the exaggeration in vertical direction. Additionally, the user has the choice between different topographic data which can be put on top of the model. By means of the slicer function parts of the model can be blanked out, so the user gains more detailed insights into the model. Moreover, virtual boreholes and profile sections can be interactively created. Filter functions, spatial measuring tools and storing of scalable screen shots complete the functionalities. Further hints for the usage of the web application are found on the graphical user interface.