3D Builder and Viewer are essential tools for 3D modeling and visualization. 3D Builder is a Windows app that allows users to create and edit 3D models. It provides a variety of tools for designing and modifying objects, making it easy to create custom 3D models. Users can start from scratch or use existing 3D models as a base, making it suitable for both beginners and advanced users. Once the model is complete, users can export it for 3D printing, sharing, or use in other applications. 3D Viewer, on the other hand, is a built-in app that allows users to view 3D models in various formats. It supports common file types such as .obj, .fbx, .ply, and .stl, making it easy to open and visualize 3D models from different sources. Users can rotate, zoom, and pan around the models to inspect them from different angles, providing a clear understanding of the design. 3D Viewer also supports mixed reality, allowing users to place the 3D models in their physical environment using compatible devices. This feature is useful for visualizing how the 3D models will look in real life, offering a more immersive experience. Both 3D Builder and Viewer are valuable tools for anyone working with 3D modeling, whether for 3D printing, game development, product design, or educational purposes. They provide intuitive interfaces and powerful features, making it easier for users to create, edit, and visualize 3D models. With compatibility with Windows devices and broad file format support, these tools are accessible and versatile for a wide range of users. Whether you're a hobbyist, professional, or student, 3D Builder and Viewer are essential assets to have in your 3D modeling workflow.