How to Open an STP File. Several software programs can open STEP 3D CAD files, but Autodesk Fusion 360 is the most versatile since it runs on Windows, macOS, mobile devices, and the web.

This post talks about what is an STP file and how you can open such files in Windows 11/10. STP or STEP is a 3D assembly file saved in Standard for the Exchange of Product Data (STEP) format.