Autodesk Viewer is a free online tool that allows users to view and share 2D and 3D design files without needing to install any software. It supports a variety of file formats, including DWG, DXF, and FBX, making it useful for architects, engineers, and designers who need to collaborate on projects. With Autodesk Viewer, users can easily upload their files, navigate through the designs, and even add comments for feedback. The platform is accessible from any device with internet access, ensuring that team members can stay connected and informed, regardless of their location.