If you work with 3D modeling and design, chances are you’ve come across STP files. These files, also known as Standard for the Exchange of Product Data or STEP, are used for representing 3D designs in a standardized format. To view and interact with these files, you’ll need an STP reader. Fortunately, there are plenty of free options available that offer great features and functionality. If you’re in need of a reliable STP reader that won’t cost you a penny, check out our list of the 10 best free options below: 1. FreeCAD – This open-source parametric 3D CAD modeler provides support for STP files and offers a range of tools for 3D modeling. 2. eDrawings Viewer – eDrawings is a popular choice for viewing and sharing 3D models, and it fully supports STP files. 3. 3D-Tool Free Viewer – This viewer allows you to open and view STP files as well as a variety of other 3D file formats. 4. SolidView/Lite – SolidView/Lite is a free viewer for SolidWorks files, including STP files, that offers measure and markup tools. 5. Autodesk Fusion 360 – If you’re looking for a more advanced tool, Fusion 360 offers a free personal license that includes support for STP files. 6. EnSuite-View – EnSuite-View is a free CAD viewer that supports a wide range of file formats, including STP. 7. CATIA V5 Viewer – This free viewer from 3D-Tool allows you to open and view CATIA V5 and STP files. 8. Onshape – Onshape is a cloud-based CAD platform that offers a free plan with support for importing and viewing STP files. 9. A360 Viewer – A360 Viewer is a web-based tool from Autodesk that allows you to view 2D and 3D files, including STP. 10. IGES Viewer – This free viewer from 3D-Tool supports IGES and STP files, making it a versatile option for viewing 3D models. With these free STP readers, you’ll be able to easily open, view, and interact with your STP files without breaking the bank. Whether you’re a professional designer or just someone who needs to occasionally view 3D models, these tools offer the functionality you need at no cost. Try out a few of these options to find the one that best suits your workflow and enjoy hassle-free STP file viewing!