There is no native app to view or convert IGS files in Windows 11/10. But, no worries. You can use some third-party applications that allow you to open and view IGS files and also convert them.

So, you will have to use a third-party tool that allows you to open an STP file. In this article, I will share free software and online web services to visualize STP or STEP files on Windows 11/10.