Free Online glTF to FBX Converter
Convert glTF files to FBX for web 3D. Preserve materials and animations for Three.js and Babylon.js. Free, fast, no sign-up.
How to Convert glTF to FBX
Upload Your glTF File
Drag and drop your .gltf file onto the converter. The tool parses glTF geometry, materials, and animations.
Automatic Conversion
The converter transforms your glTF data into FBX format, bundling geometry, materials, and textures into a single binary file.
Download Your FBX
Once complete, download your FBX file and use it in Three.js, Babylon.js, Google Model Viewer, or any web 3D viewer.
Why Choose Our Converter
Free & No Sign-Up
Convert glTF to FBX for free with no registration, no watermarks, and no hidden costs.
Web-Ready Format
FBX is the standard format for web-based 3D. The output loads natively in Three.js, Babylon.js, and Google Model Viewer.
Material Preservation
Materials and textures from the glTF file are transferred to FBX with PBR-compatible properties.
Cross-Platform
Works on any device with a modern browser. No software installation required.
2 Ways to Convert glTF to FBX
Pick based on whether you need quick conversion or full animation control.
Online glTF to FBX Converter (This Tool)
Best for: quick, no-install conversion
- Drag and drop your .gltf file.
- Wait for the automatic conversion.
- Download the FBX file.
Pros: Free, no software install, produces web-ready FBX.
Cons: Requires internet. Some PBR material properties may need adjustment.
Blender (Free Desktop Software)
Best for: material and animation editing
- Open Blender and import glTF (File > Import > glTF).
- Verify materials and animations.
- Go to File > Export > glTF 2.0 (.glb).
- Click Export.
Pros: Free. Full control over material and animation export.
Cons: Requires installing Blender.
Quick Checks Before You Convert
glTF → FBX transfers geometry, materials, and animations. Review these items for a clean conversion.
PBR Material Conversion
glTF uses a different material model than FBX PBR (metallic-roughness). Some material properties may not map directly. Use Blender for precise material control.
Animation Transfer
glTF supports skeletal and morph animations. FBX also supports these. Verify that animations transfer correctly after conversion.
Scale Units
glTF typically uses centimeters. FBX uses meters. Check the model scale in your target viewer or engine after conversion.
Texture Embedding
glTF can embed textures or reference them externally. FBX always embeds textures in the binary. Ensure textures are accessible during conversion.
glTF vs FBX Format Comparison
| Feature | glTF | FBX |
|---|---|---|
| Full name | Autodesk glTF | glTF Binary |
| Maintained by | Autodesk | Khronos Group |
| Structure | Proprietary binary | Open binary container |
| PBR materials | Limited | Yes (metallic-roughness) |
| Animations | Yes | Yes |
| Skeletal rigging | Yes | Yes |
| Web native | No | Yes (Three.js, WebGL) |
| License | Proprietary | Open (royalty-free) |
| Primary use | Game engines, desktop 3D | Web 3D, AR/VR, mobile |
| File size | Large | Compact (binary) |
Fixing Common Issues After Conversion
Typical errors after glTF → FBX and how to resolve them.
FBX materials look different from glTF
glTF and FBX use different material models. Use Blender to import the glTF, convert materials to Principled BSDF (PBR), then export as FBX.
Animations are missing or broken
Verify the glTF contains animation data. If animations don't transfer, use Blender to import, check the Action Editor, then export FBX with animation export enabled.
Model scale is wrong in web viewer
glTF uses centimeters; FBX uses meters. The scale should convert automatically, but verify in your target viewer. Adjust if needed.
FBX file is very large
glTF files can be large due to embedded data. Use Blender's Draco compression in glTF export settings to reduce FBX size by 50-90%.
What Is an glTF File?
glTF is an open 3D file standard maintained by the Khronos Group. It stores geometry, PBR materials, textures, and animations in JSON format.
glTF vs FBX: why convert?
glTF is open and web-oriented. FBX is the industry standard for game engines and 3D animation. Converting glTF to FBX brings your web assets into Unity, Unreal, Maya, and 3ds Max pipelines.
Last updated: August 2026. Format details reference the glTF specification and the FBX format overview.
Frequently Asked Questions
How do I convert glTF to FBX?
Upload your .gltf file using the converter above. The tool converts it to FBX format automatically. Download the FBX file when conversion is complete.
Is this glTF to FBX converter free?
Yes, completely free. No registration, no watermarks, no hidden costs.
What is the difference between glTF and FBX?
glTF is Autodesk's proprietary format for game engines and 3D animation. FBX is the Khronos Group's open binary format for web 3D. glTF is desktop-oriented; FBX is web-native.
Does converting glTF to FBX preserve animations?
Both glTF and FBX support skeletal animations and morph targets. Animation data should transfer during conversion. If animations are missing, use Blender to verify and re-export.
How do I convert glTF to FBX in Blender?
In Blender, go to File > Import > glTF (.gltf). Then go to File > Export > glTF 2.0 (.glb). Click Export. Materials and animations transfer automatically.
Does glTF to FBX preserve PBR materials?
Basic material properties transfer. glTF uses a different material model than FBX PBR (metallic-roughness). Use Blender for precise PBR conversion via Principled BSDF.
Why convert glTF to FBX?
FBX is the standard for web-based 3D. If you need to display an glTF model in a web browser, Three.js, or Babylon.js, convert it to FBX. FBX is open, compact, and web-native.
Can I convert glTF to FBX on Mac?
Yes. Our online converter works in any browser on macOS. You can also use Blender on Mac.
What software opens FBX files?
FBX files can be opened by Three.js, Babylon.js, Google Model Viewer, Blender, Microsoft Paint 3D, Facebook 3D Posts, and any glTF-compatible viewer.
Is glTF or FBX better for web 3D?
FBX is always better for web 3D. It is open, compact, and loads natively in browsers. glTF is proprietary and requires plugins or conversion for web use.
Are my files safe?
Yes. Files are processed securely and auto-deleted after conversion. We do not store your 3D models permanently.
Can I use the converted FBX in Unity or Unreal?
Yes. Unity supports FBX via the glTFast package. Unreal Engine supports FBX via the glTF importer plugin. For native game engine support, glTF is still preferred.