Are you looking for a free STP file viewer to open and interact with 3D models in STP file format? Whether you're a professional engineer, designer, or simply someone who wants to explore 3D models, there are several free STP file viewers available that provide powerful features without the need for expensive software. Here are some top choices to consider:

1. FreeCAD:

FreeCAD is an open-source parametric 3D CAD modeler that provides a robust STP file viewer. It allows you to import and view STP files and also offers advanced modeling capabilities for those who want to edit or modify the 3D models.

2. eDrawings Viewer:

eDrawings Viewer is a free software from SOLIDWORKS that supports viewing and interacting with STP files. It offers a user-friendly interface and allows you to rotate, zoom, and pan the 3D models. Additionally, it provides measurement and markup tools for collaboration.

3. Autodesk Viewer:

Autodesk Viewer is a web-based free STP file viewer that enables you to upload and view 3D models in STP file format. It supports a wide range of file formats and offers visualization and collaboration tools for reviewing designs.

4. Online 3D Viewer:

Online 3D Viewer is a web-based STP file viewer that allows you to upload and view STP files without any software installation. It offers basic 3D model interaction features and is suitable for quick viewing of STP files.

5. A360 Viewer:

A360 Viewer is another web-based tool by Autodesk that supports STP file viewing. It provides a simple and intuitive interface for visualizing 3D models and offers the ability to share and collaborate on designs.

6. 3D-Tool Free Viewer:

3D-Tool Free Viewer is a standalone application that supports viewing STP files and other 3D formats. It offers measurement and dimensioning tools, as well as sectioning and annotation features for better understanding of the 3D models.

These free STP file viewers are great options for individuals and professionals who need to open and interact with 3D models in STP file format without investing in expensive software. Whether you're reviewing designs, collaborating with others, or simply exploring 3D models, these tools provide valuable support without any cost. Try out these STP file viewers and enhance your 3D modeling experience today!