Currently, the service provided by GRAD4 has an interface for visualization of CAD models. However, there is still room for improvement in speed and comprehensibility for the users: both manufacturers and buyers. The main challenge of implementing the improvements is in relatively high computational cost of such visualizations: while a regular PC handles such task efficiently, web-based tools tend to have difficulties when modelling 3D object with similar performance. Based on this, it is proposed 1) to investigate ways of improving geometric representations of CAD models on a web-page; 2) to retrieve and analyze user feedback on the viewer and take according actions; and 3) to identify future venues for viewer development.