If you often work with 3D models and designs, you may come across STP files. These files are commonly used for storing 3D models and require a specialized viewer to open and view them. Fortunately, there are several free STP file viewer tools available that allow you to easily open and visualize these files without any cost. Here are 7 best free STP file viewer tools that you need to know:

1. FreeCAD

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

2. eDrawings Viewer

eDrawings Viewer is a free tool from SOLIDWORKS that allows you to view and collaborate on 2D and 3D CAD files. It supports various file formats, including STP, and provides easy-to-use navigation and visualization tools.

3. Autodesk Fusion 360

Autodesk Fusion 360 is a cloud-based 3D CAD, CAM, and CAE platform that offers a free tier for hobbyists and enthusiasts. It supports STP files and provides robust viewing capabilities along with other advanced design and simulation features.

4. 3D-Tool Free Viewer

3D-Tool Free Viewer is a powerful tool for visualizing and analyzing 3D models, including STP files. It offers cross-sectioning, measurement, and annotation tools, making it ideal for inspecting and reviewing 3D designs.

5. STEP File Viewer

STEP File Viewer is a simple yet effective tool for opening and viewing STP and other STEP files. It provides basic visualization features and is suitable for users who need a lightweight and easy-to-use STP file viewer.

6. A360 Viewer

A360 Viewer is a free online tool from Autodesk that allows you to view 2D and 3D files, including STP, directly in your web browser. It supports collaborative viewing and markup features, making it convenient for sharing and reviewing design files.

7. 3DViewStation

3DViewStation is a feature-rich 3D CAD viewer that offers a free version for personal and non-commercial use. It supports a wide range of file formats, including STP, and provides advanced analysis and visualization tools for professional users.

With these free STP file viewer tools, you can easily open, view, and inspect STP files without investing in expensive software. Whether you're a hobbyist, student, or professional designer, these tools offer the functionality you need to work with 3D models effectively. Try them out and find the best STP file viewer that fits your requirements!