The OBJ file format is a widely used file format in 3D modeling and computer graphics. It is a simple, text-based file format that represents 3D geometry, including vertices, normals, texture coordinates, and other information required to define the shape and appearance of 3D models. The OBJ file format does not contain animation or material properties, making it primarily used for static 3D models. Understanding the OBJ file format is essential for 3D artists, game developers, and anyone involved in 3D graphics. The file format consists of a header section, which defines the type of data contained in the file, followed by data sections that define the geometry of the 3D model. The header section includes information about the file such as its name, the software used to create it, and other optional information. The data sections contain vertex data, texture coordinate data, normal data, and face data, which together define the 3D geometry. OBJ files can be opened and edited using various 3D modeling software such as Blender, Maya, 3ds Max, and others. They are compatible with most 3D rendering and animation software, making the OBJ file format a versatile choice for sharing 3D models across different platforms and applications. In summary, the OBJ file format is a popular choice for storing 3D geometry and is widely used in 3D modeling and computer graphics. Its simplicity and compatibility make it an essential file format for anyone working with 3D models.