The 3D Viewer is an app developed by Microsoft that allows users to view, interact with, and share 3D models on Windows 10 devices. It provides a simple and intuitive way to explore 3D objects, whether they are created using 3D modeling software or obtained from the web.

One of the key features of the 3D Viewer is its support for a wide range of 3D file formats, including .fbx, .obj, .3mf, and .stl. This compatibility makes it easy for users to open and view 3D models created in different applications, allowing for greater flexibility and accessibility.

With the 3D Viewer, users can rotate, pan, and zoom in on 3D models, giving them a better understanding of the object's details and texture. In addition, the app offers tools for controlling the lighting and background, allowing users to customize their viewing experience and better showcase their 3D creations.

Furthermore, the 3D Viewer enables users to annotate 3D models with measurements, notes, and labels, making it a useful tool for collaboration and communication in various industries, such as architecture, engineering, and design.

Another notable feature of the 3D Viewer is its integration with Paint 3D, another Microsoft app that allows users to create and edit 3D models. This integration enables seamless transitions between viewing and editing 3D models, providing a streamlined workflow for users who are involved in 3D content creation.

The 3D Viewer also supports mixed reality headsets, allowing users to experience their 3D models in immersive virtual environments. This capability opens up new possibilities for visualization and presentation, especially in fields such as education, entertainment, and virtual prototyping.

In summary, the 3D Viewer from Microsoft is a versatile app that empowers Windows 10 users to explore, interact with, and share 3D models with ease. Its compatibility with various 3D file formats, intuitive navigation and annotation tools, and seamless integration with Paint 3D and mixed reality headsets make it a valuable tool for anyone working with 3D content. Whether for professional or personal use, the 3D Viewer offers a compelling way to engage with 3D models on Windows 10 devices.