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.

We list the best 3D file converters, to make it simple and easy to save 3D files as different compatible formats, including proprietary ones for use in other applications. The best 3D file converter ...

I want to do some very basic editing of STEP files, e.g.: I need to do this sort of thing about a hundred times, so I'd rather learn how to fish than pay someone to do it, even if it's only a few $$ ...