If you work with 3D CAD models, you know how important it is to have a reliable STP file viewer to open and explore your designs. While there are many paid software options available, there are also several free STP file viewers that offer powerful features and easy-to-use interfaces. Whether you're a professional engineer, a student, or simply a 3D modeling enthusiast, these tools will come in handy for your projects. Here are 5 free STP file viewer tools you should try: 1. FreeCAD - FreeCAD is an open-source parametric 3D CAD modeler that supports STP file viewing and editing. It offers a wide range of modeling tools and can be used for everything from product design to mechanical engineering. 2. eDrawings Viewer - eDrawings Viewer is a free software from SOLIDWORKS that allows you to view and share STP files with ease. It also supports other 3D CAD formats and offers advanced viewing options such as measurement and markups. 3. A360 Viewer - A360 Viewer is an online tool that lets you view and collaborate on 3D designs without the need for any software installation. It supports STP files as well as many other file formats, and it's a great choice for sharing your models with clients and colleagues. 4. Glovius - Glovius offers a free version of its 3D CAD viewer that you can use to open and analyze STP files. It provides tools for visualization, analysis, and annotation, making it a valuable tool for anyone working with 3D models. 5. Online STP Viewer - If you need a quick and simple solution for viewing STP files without any downloads, the Online STP Viewer is a great choice. It's a web-based tool that lets you upload and view your models in just a few clicks. With these free STP file viewer tools, you can easily open, explore, and analyze your 3D CAD models without having to invest in expensive software. Whether you need to view a design for a project or simply want to explore the world of 3D modeling, these tools have got you covered. Try them out and see which one works best for your needs.