Are you struggling to open STP files without the expensive CAD software? Don't worry, we've got you covered with these simple and free methods.

1. Free STP File Viewer: There are several free STP file viewers available online that allow you to open and view STP files without the need for any paid software. Some popular options include FreeCAD, eDrawings Viewer, and A360 Viewer. These tools are easy to use and offer basic viewing capabilities for STP files.

2. CAD Software Trials: Many leading CAD software providers offer free trials of their software, which can be used to open STP files. This is a great option if you only need to open STP files occasionally and don't want to invest in a full software license. AutoCAD, SolidWorks, and Fusion 360 are some of the popular CAD software providers that offer free trials.

3. Online Conversion Tools: If you only need to view the contents of an STP file without editing it, you can use online conversion tools to convert the file to a more accessible format such as STL or OBJ. Websites like OnlineCADViewer and ConvertCADFiles offer free file conversion services that can help you open STP files without any hassle.

4. 3D Modeling Software: If you're interested in manipulating and editing the content of the STP file, you can use free 3D modeling software like Blender or SketchUp to import and work with STP files. These tools offer more advanced capabilities for creating and editing 3D models, making them a great option for more experienced users.

In conclusion, opening STP files for free is easier than you think. Whether you're a professional engineer or a casual user, there are plenty of free tools and software options available to help you open and view STP files without breaking the bank. Try out these methods and find the one that works best for you!