OBJ file is an end product of the 3D modeling process, usually generated by CAD (Computer Aided Design) software. It is a geometry definition file containing vertex, vertex normals, vertices, etc. In certain cases, we may need to convert an OBJ file to STL format. The STL file contains information about 3D vector graphics. In this article, we will learn how to convert an OBJ file to STL format in Python.