Are you working with 3D models and need to check if a file is in OBJ format? Here's a quick guide to help you out.

First, you can check the file extension. OBJ files typically end with '.obj', so if the file you're inspecting has this extension, it's likely in OBJ format.

Next, you can open the file in a text editor and look for specific OBJ format indicators, such as 'v' for vertices, 'vn' for vertex normals, 'vt' for texture coordinates, and 'f' for faces. If you see these elements in the file, it's most likely in OBJ format.

Another way to check is by using software that supports OBJ files, such as Blender or Maya. Simply try to import the file into the software, and if it loads without errors, it's likely in OBJ format.

Lastly, you can use third-party software or online tools designed to inspect file formats. These tools can provide detailed information about the file, including its format and structure.

By following these tips, you can easily check if a file is in OBJ format and work with 3D models efficiently. Happy modeling!