Are you in need of a reliable STP file viewer but don't want to spend a fortune on expensive CAD software? Look no further! We've compiled a list of the best free tools for viewing your 3D models and STEP files without breaking the bank.

1. FreeCAD: FreeCAD is an open-source parametric 3D CAD modeler, perfect for viewing and editing STP files. It provides a full set of features for creating and modifying your designs, making it a great option for both beginners and advanced users.

2. eDrawings Viewer: Developed by SolidWorks, eDrawings Viewer is a free tool for viewing, printing, and reviewing 3D models and 2D drawings in STP and other file formats. It offers a user-friendly interface and powerful viewing capabilities, making it an excellent choice for engineers, designers, and collaborators.

3. Free STP Viewer: As the name suggests, Free STP Viewer is a simple and easy-to-use tool for viewing 3D models in STP and other file formats. It supports zooming, rotating, and panning, allowing you to inspect your designs from every angle without any cost.

4. Autodesk Viewer: Autodesk offers a free online viewer that supports over 50 file formats, including STP, DWG, and RVT. It allows you to view, measure, and share your 3D models and 2D drawings directly in your web browser, making it a convenient option for quick and easy access to your designs.

5. SolidView/Pro: SolidView/Pro offers a free version of their software for viewing 3D models in various file formats, including STP. It provides tools for analyzing, measuring, and sectioning your designs, giving you a comprehensive view of your models without the need for expensive CAD software.

Whether you're a professional engineer, a student, or an enthusiast looking to explore 3D modeling, these free STP file viewers are excellent options for accessing, reviewing, and sharing your 3D models without any cost. Try them out and discover the perfect tool for your viewing needs!