Convert OBJ to FBX
Promote a static Wavefront OBJ to a modern FBX scene readable by Unity, Unreal, Maya, 3ds Max — every animation tool out there. Geometry and UVs come through; the .mtl materials get rebuilt as FBX Phong slots.
obj to fbx converter · convert .obj to .fbx · wavefront to fbx
Drop a file
OBJ
.obj
Export
FBX
.fbx
Why convert OBJ to FBX?
OBJ has been the universal static-geometry format for 30 years, but the moment you want to animate, rig, or use a modern engine pipeline, you need FBX. The conversion is purely additive — OBJ is a strict subset of what FBX can carry, so nothing is lost going in this direction.
What carries: vertex positions, faces, UV coordinates, vertex normals (computed if absent), vertex colors when present, and the .mtl material assignments rebuilt as FBX Phong materials. The FBX you get has no animation, no rig, no PBR — it can't have what the OBJ didn't have to begin with. But it's a proper FBX scene ready for further work in Maya, Blender, or import into Unity/Unreal.
If your .mtl referenced texture files, drop those alongside the OBJ before converting — the texture references are preserved and the engine will look them up by relative path on import.
What survives the OBJ → FBX conversion
Computed automatically from the capabilities of each format.
| Feature | OBJ | FBX | Status |
|---|---|---|---|
| Geometry (vertices & faces) | ✓ | ✓ | Preserved |
| UV texture coordinates | ✓ | ✓ | Preserved |
| Vertex normals | ✓ | ✓ | Preserved |
| Vertex colors | — | ✓ | N/A |
| Basic materials (diffuse, specular) | ✓ | ✓ | Preserved |
| Embedded textures | — | ✓ | N/A |
| Keyframe animations | — | ✓ | N/A |
| Skeletons & rigs (skinning) | — | ✓ | N/A |
| Morph targets / blend shapes | — | ✓ | N/A |
| Multiple meshes in one file | ✓ | ✓ | Preserved |
| Parent/child hierarchy | — | ✓ | N/A |
When you need this conversion
Tips
Common pitfalls
Read these before converting — they save hours of debugging in your engine.
No animations magically appear
FBX supports animations, but the OBJ has none — so the FBX has none either. The converter doesn't fabricate keyframes.
Materials stay basic
Wavefront .mtl is pre-PBR. The Phong slots in the resulting FBX won't magically become PBR — rebuild PBR in your engine if needed.
Texture files must accompany the OBJ
If the .mtl references external texture files (map_Kd, map_Bump), they're referenced by name in the FBX output. Drop them next to your OBJ before converting so the references resolve.
FBX is bigger than OBJ
FBX is binary and verbose. Expect a 2-4× size increase. If size matters and you don't need animation features, stay in OBJ.