OBJ to FBX converter
Convert OBJ to FBX free online for Unity, Unreal Engine, and Autodesk tools. Bring universal meshes into game and animation pipelines. No signup required.
Drop a file to convert here
or click to browse
About Filmbox
Common Use Cases
- Importing OBJ meshes into Unity or Unreal Engine
- Bringing models into Maya, 3ds Max, or MotionBuilder
- Converting static meshes for animation pipelines
OBJ is universally supported but lacks features that game engines and DCC tools expect, like scene hierarchy and optimized binary storage. FBX is the pipeline format for Unity, Unreal, Maya, and 3ds Max. Converting OBJ to FBX slots your models into professional production workflows.
OBJ is a simple text-based mesh format, while FBX is a rich binary format with support for scene hierarchies, materials, and metadata that game engines and Autodesk tools rely on.
Why Convert OBJ to FBX?
Native import in Unity and Unreal
Both Unity and Unreal Engine have optimized FBX importers that handle materials, hierarchies, and scene setup automatically. FBX is the recommended format for both engines.
Full compatibility with Autodesk tools
Maya, 3ds Max, MotionBuilder, and Mudbox all treat FBX as their primary exchange format. Converting from OBJ opens up the entire Autodesk ecosystem.
Binary format for faster loading
FBX uses binary encoding that loads faster than text-based OBJ, especially for large meshes with millions of vertices.
Ready for animation and rigging
Once in FBX format, you can add skeletal rigs, animations, and blend shapes in your DCC tool and the file retains all that data for export.
When to use each
Use OBJ when...
- Sharing static meshes across any tool
- You want a human-readable text format
- Simple geometry without scene hierarchy
- Quick prototyping and inspection
- Archiving clean mesh data
Use FBX when...
- Importing into Unity or Unreal Engine
- Working in Maya, 3ds Max, or MotionBuilder
- You need scene hierarchy and metadata
- Production pipelines with animation
- Exchanging assets between studios
Common use cases
- Importing OBJ meshes into Unity or Unreal Engine
- Bringing models into Maya, 3ds Max, or MotionBuilder
- Converting static meshes for animation pipelines
How to use
- Upload your OBJ file. Drag and drop a .obj file onto the upload area, or click to browse. Files up to 500 MB are supported.
- Run the conversion. Click Convert File. Geometry and materials are read from the OBJ and .mtl, then written as a binary FBX file.
- Download your FBX. Save the .fbx file and import it into Unity, Unreal, Maya, or any DCC tool. Files are deleted from our servers within 1 hour.
Frequently asked questions
- Will Unity and Unreal import the FBX correctly?
- Yes. The output is a standard binary FBX that both engines import natively with their built-in importers.
- Are materials from the .mtl file included?
- Yes. Material properties from the companion .mtl file are mapped to FBX materials during conversion.
- Can I add animations after conversion?
- Yes. The FBX contains static geometry that you can rig and animate in Maya, 3ds Max, Blender, or any tool that supports FBX.
- Is converting OBJ to FBX free?
- Yes. Free with no signup. Anonymous users get a daily allowance, registered accounts get higher limits, and Premium or Lifetime members get unlimited conversions.
- What is the file size limit?
- The maximum file size is 500 MB per conversion.