If you work with 3D design or engineering, chances are you've come across STP files. These standard files are used for storing 3D models and are commonly used in CAD software. However, finding a reliable and free STP file reader can be a challenge. To help you out, we've rounded up 5 of the best STP readers that won't cost you a penny. Whether you're a professional designer or just need to view an STP file occasionally, these tools have you covered. 1. FreeCAD: FreeCAD is a popular open-source parametric 3D modeler that also functions as an STP file reader. It offers a wide range of features for creating and editing 3D models, making it a versatile option for professionals. 2. eDrawings Viewer: eDrawings Viewer is a free software from SOLIDWORKS that allows you to view and share STP files easily. It provides a user-friendly interface and supports various file formats, making it a great choice for collaboration. 3. 3D-Tool Free Viewer: 3D-Tool Free Viewer is a lightweight and fast STP file reader with advanced measuring and analysis tools. It's a great option for inspecting and visualizing 3D models without the need for expensive software. 4. 3D-Viewer: 3D-Viewer is a free and easy-to-use STP file reader that supports a wide range of 3D file formats. It offers basic viewing and annotation tools, making it suitable for casual users and beginners. 5. Autodesk Viewer: Autodesk Viewer is a web-based STP file reader that allows you to view and share 3D models on any device. It's a convenient option for online collaboration and presentations. With these free STP readers, you can easily open and view STP files without breaking the bank. Whether you're a professional designer, engineer, or student, having access to reliable STP file readers is essential for working with 3D models. Try out one of these recommended options and discover a hassle-free way to access and explore STP files for your projects.