This article talks about what is an STL file and how you can open and view it in Windows 11/10. STL stands for Standard Tessellation Language and Standard Triangle Language. A file with .stl ...
I found that the app was very easy to use too, with guided instructions on-screen and an augmented reality mesh for you ... commonly accepted file types for slicers are STL, GCODE, 3MF or OBJ.