This data is presented in plain text, making OBJ files human-readable and easy to exchange between various 3D modeling and rendering software. OBJ files store geometric data, such as vertex positions, normals, texture coordinates, and face information, describing the surface of a 3D object.

It stands for 'Object' and was originally developed by Wavefront Technologies. An OBJ file is a widely used file format in 3D computer graphics that serves as a standard representation for 3D models.