If you're ready to dive into the exciting world of 3D modeling and 3D printing, you'll need to learn how to open OBJ files. OBJ (or .obj) is a popular file format used for representing 3D object data. In this beginner's guide, we'll walk you through the steps to open and explore OBJ files. Whether you're a designer, artist, or hobbyist, understanding how to work with OBJ files is an important skill to have.