SelfCAD is a 3D modeling software that allows you to 3D design, model, sculpt, sketch, render, animate. The best Free Cad online software. 3D design is the process of using software to create a mathematical representation of a 3-dimensional object or shape. The created object is called a 3D model and these 3-dimensional models are used for computer-generated (CG) design. 3D design is used in a variety of industries to help artists shape, communicate, document, analyse and share their ideas. Tinkercad is a free web app for 3D design, electronics, and coding. We’re the ideal introduction to Autodesk, a global leader in design and make technology. Unlike traditional 2D graphics, 3D design incorporates depth for more complex and realistic visualizations that can be viewed and optimized from any angle. 3D design software allows designers and engineers to shape, communicate, analyze, and share their ideas effectively.