Are you in need of a reliable and free STP file viewer to open and inspect your 3D models? Whether you're a CAD designer, engineer, or simply work with 3D models, having the right software to view and analyze STP files is crucial. In this article, we'll explore the best free STP file viewers available in 2021, so you can easily choose the one that suits your needs.

1. FreeCAD

FreeCAD is an open-source parametric 3D CAD modeler that comes with a built-in STP file viewer. It's a powerful software that offers advanced features for designing and analyzing 3D models. With FreeCAD, you can not only view STP files but also make modifications and create new designs.

2. eDrawings Viewer

eDrawings Viewer is a free software from SOLIDWORKS that allows you to view, print, and review STP files. It provides intuitive and easy-to-use tools for inspecting 3D models, including dynamic cross-sectioning, measurement, and markup capabilities. eDrawings Viewer is compatible with both Windows and Mac platforms.

3. 3D-Tool Free Viewer

3D-Tool Free Viewer is a lightweight and powerful STP file viewer that offers a wide range of analysis and visualization tools. It supports various 3D file formats, including STP, and allows users to easily inspect and measure 3D models. The software also provides cross-sectioning, exploded view, and animation features.

4. Gmsh

Gmsh is an open-source 3D finite element mesh generator with a built-in STP file viewer. While it's primarily designed for meshing, Gmsh includes a user-friendly interface for viewing and manipulating 3D models in various formats, including STP. It's a great option for users who need basic STP file viewing capabilities along with meshing tools.

5. Autodesk Viewer

Autodesk Viewer is a web-based tool that allows you to view and collaborate on 2D and 3D designs, including STP files, without the need for any software installation. It provides a range of features for inspecting and annotating 3D models, making it a convenient option for sharing and reviewing designs with team members and clients.

In conclusion, there are several excellent free STP file viewers available for you to choose from. Whether you need advanced design and analysis capabilities or simply want to view and share 3D models, the right STP viewer software is essential for your workflow. Consider trying out the options mentioned in this article to find the best free STP file viewer that meets your requirements.