Are you searching for a user-friendly and free online STP file viewer to easily view and share 3D models? Look no further! In this article, we'll introduce you to the best free online STP file viewer that will make viewing and sharing 3D models a breeze.

1. FreeCAD: FreeCAD is a powerful open-source parametric 3D CAD modeler. It supports the STP file format and allows you to view and modify 3D models with ease. FreeCAD is a great choice for beginners and professionals alike.

2. 3D-Tool: 3D-Tool is another excellent online STP file viewer that offers a free version for viewing and analyzing 3D models. It provides a user-friendly interface and supports a wide range of 3D file formats, including STP.

3. ShareCAD: ShareCAD is a web-based platform that allows you to view, share, and collaborate on 3D CAD models online. It supports the STP file format and provides a seamless experience for viewing and sharing 3D models with others.

4. A360 Viewer: A360 Viewer is a free web-based tool by Autodesk that enables you to view 2D and 3D files, including STP files, on any device. It offers intuitive navigation and visualization tools for a smooth viewing experience.

5. Online 3D Viewer: Online 3D Viewer is a simple and free web-based STP file viewer that allows you to upload and view 3D models in various formats, including STP. It offers basic visualization features and is suitable for quick model viewing.

In conclusion, these are some of the best free online STP file viewers that provide a seamless experience for viewing and sharing 3D models. Whether you're a beginner or a professional, these tools offer user-friendly interfaces and powerful features to meet your needs. Try them out and find the perfect STP file viewer for your 3D modeling projects!