Modelur is a parametric urban design tool that integrates with SketchUp to facilitate efficient 3D urban planning. It allows urban planners, architects, and designers to create and evaluate urban massing models rapidly by adjusting parameters such as building height, floor count, and land use. The software provides real-time calculations and insights regarding urban indicators like population density, building floor area ratios, and green space, helping users optimize their designs according to specific urban planning regulations and guidelines. Modelur aims to enhance the productivity and accuracy of the urban design process.