How to Open OBJ Files in Unity
Unity is a widely used game engine for mobile, desktop, console and XR games, and it imports models by copying them into the project's Assets folder.
Short answer · Built in
Yes. Unity opens OBJ files as shipped: drag the .obj (and its .mtl) into the Project window.
Import OBJ into Unity, step by step
- 1Check the fileKeep the .mtl file and any texture images in the same folder as the .obj, with their original names; the OBJ refers to them by name.
- 2Import into UnityDrag the .obj (and its .mtl) into the Project window.
- 3Check scale and orientationUnity works in metres and is Y-up. OBJ files are unitless, so the size depends on what the exporter assumed.
- 4Check materials and animationOBJ carries basic materials in a separate .mtl file, and no animation. Look at the model under a neutral light before you build on it.
What comes through
| Shape | Yes, always. |
| Colours and materials | Yes: basic materials in a separate .mtl file. |
| Textures | OBJ doesn't store texture images. |
| Animation | No: OBJ has no animation. |
Things to watch for
- Unity reads basic colours from the .mtl; textures usually need assigning again in the material.
- Select the imported model and check Scale Factor and Convert Units in the Model tab of the Inspector before placing it in a scene.
Questions
- Does Unity support OBJ files?
- Yes. Unity opens OBJ files as shipped: drag the .obj (and its .mtl) into the Project window.
- Why is my OBJ model the wrong size in Unity?
- OBJ files are unitless, while Unity works in metres. Select the imported model and check Scale Factor and Convert Units in the Model tab of the Inspector before placing it in a scene.
- What is the best 3D format for Unity?
- FBX and OBJ are the most reliable choice for Unity. OBJ is one of them, so you're already using a good option.
Menu names follow Unity Technologies's current release. Check the official Unity documentation if your version differs.
Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.