STP (Standard for the Exchange of Product Data) files are commonly used for 3D mechanical design data exchange. However, finding a reliable and free STP file viewer can be challenging. In this article, we'll introduce you to the best tools that will allow you to open and view STP files for free.

1. FreeCAD

FreeCAD is a popular open-source parametric 3D CAD modeler that also serves as a great STP file viewer. It supports a wide range of file formats, including STP, and provides powerful tools for viewing and analyzing 3D models.

2. eDrawings Viewer

eDrawings Viewer is a free software from SOLIDWORKS that allows users to view, print, and review STP files. It offers a user-friendly interface and supports various 3D file formats, making it a versatile choice for viewing STP files.

3. Autodesk Viewer

Autodesk Viewer is a web-based tool that enables users to view 2D and 3D designs without the need for additional software. It supports STP files and provides powerful visualization and collaboration features for free.

4. ShareCAD

ShareCAD is an online platform that allows users to view CAD files, including STP, online for free. It provides a simple and intuitive interface for uploading and viewing 3D models, making it a convenient choice for users who prefer web-based solutions.

5. 3D-Tool Free Viewer

3D-Tool Free Viewer is a user-friendly software that allows users to view and analyze 3D models, including STP files, for free. It offers easy navigation and visualization tools, making it suitable for both beginners and experienced users.

In conclusion, there are several reliable and free STP file viewers available, each offering unique features and functionality. Whether you prefer desktop software or online platforms, you can easily find a suitable tool to open and view STP files for free. We hope this article helps you find the best STP file viewer for your needs.