Free Online OBJ to glTF Converter
Convert OBJ files to glTF JSON format with PBR materials. Editable, inspectable, and universally compatible. Free, fast, no sign-up.
How to Convert OBJ to glTF
Upload Your OBJ File
Drag and drop your .obj file onto the converter. Include the .mtl file for material support.
Automatic Conversion
The converter transforms your OBJ geometry and MTL materials into glTF JSON format with external or embedded resources.
Download Your glTF
Once complete, download your .gltf file and use it in Three.js, Babylon.js, Blender, or any glTF-compatible 3D software.
Why Choose Our Converter
Free & No Sign-Up
Convert OBJ to glTF for free with no registration, no watermarks, and no hidden costs.
Editable JSON Output
Unlike GLB's binary format, glTF outputs human-readable JSON that you can inspect, edit, and debug.
MTL Material Support
Materials defined in companion .mtl files are transferred to glTF format with PBR-compatible properties.
Universal Compatibility
glTF is the Khronos Group standard for 3D. The output loads in any glTF-compatible viewer, engine, or tool.
2 Ways to Convert OBJ to glTF
Pick based on whether you need quick conversion or PBR material editing.
Online OBJ to glTF Converter (This Tool)
Best for: quick, no-install conversion
- Drag and drop your .obj file.
- Wait for the automatic conversion.
- Download the .gltf file.
Pros: Free, no software install, produces editable JSON output.
Cons: Requires internet. glTF JSON may reference external binary (.bin) and texture files.
Blender (Free Desktop Software)
Best for: material editing and PBR conversion
- Open Blender and import OBJ (File > Import > Wavefront).
- Verify and fix materials.
- Go to File > Export > glTF 2.0 (.gltf).
- Select .gltf format (not GLB) and click Export.
Pros: Free. Can convert materials to Principled BSDF (PBR) before export. Full control over glTF extensions.
Cons: Requires installing Blender.
Quick Checks Before You Convert
OBJ → glTF converts geometry and materials to PBR format. Review these items to ensure a clean conversion.
Include MTL File
Without the companion .mtl file, glTF output will have default materials. Upload both .obj and .mtl together for proper material conversion.
Texture File Paths
MTL files reference texture images by path. Ensure texture files are accessible. glTF can embed or reference textures externally.
PBR Material Conversion
OBJ/MTL uses a simple material model (ambient, diffuse, specular). glTF uses PBR (metallic-roughness). Some material properties may not map directly.
glTF vs GLB Output
glTF produces JSON + external .bin + texture files. GLB bundles everything into one binary file. Choose glTF for editability, GLB for deployment.
OBJ vs glTF Format Comparison
| Feature | OBJ | glTF |
|---|---|---|
| Full name | Wavefront Object | GL Transmission Format |
| Maintained by | Wavefront Technologies | Khronos Group |
| Structure | Text-based | JSON + binary (.bin) |
| Color / texture | Yes (MTL + image files) | Yes (embedded or external) |
| PBR materials | No (ambient/diffuse/specular) | Yes (metallic-roughness) |
| Animations | No | Yes |
| Multiple objects | Yes (named groups) | Yes (scene nodes) |
| File output | Multiple files (.obj + .mtl + textures) | JSON + .bin + textures (or GLB) |
| Primary use | CAD, animation, scanning | Web 3D, game engines, AR/VR |
| Editable | Yes (text-based) | Yes (JSON-based) |
Fixing Common Issues After Conversion
Typical errors after OBJ → glTF and how to resolve them.
glTF has missing external resources
glTF JSON references external .bin and texture files. Ensure all files are kept in the same directory. If you need a single file, convert to GLB instead.
Materials look different in glTF viewer
OBJ/MTL uses ambient/diffuse/specular model. glTF uses PBR metallic-roughness. Use Blender to convert materials to Principled BSDF before exporting glTF.
glTF file won't load in Three.js
Ensure the .bin buffer file and texture images are in the correct relative paths. Use Three.js GLTFLoader which handles external resources automatically.
Animations are missing
OBJ format does not support animations. The glTF output will be a static model. To add animations, use Blender to create keyframes before exporting glTF.
What Is an OBJ File?
OBJ is a 3D model file format that stores mesh geometry — vertices, faces, texture coordinates, and normals — as human-readable text, with optional material definitions in a companion .mtl file.
Developed by Wavefront Technologies in the 1990s, OBJ is one of the oldest and most widely adopted 3D geometry file formats. Virtually every 3D application — Blender, Maya, 3ds Max, MeshLab, ZBrush — can import and export OBJ files.
OBJ vs glTF: why convert?
OBJ uses a simple ambient/diffuse/specular material model. glTF uses the modern PBR (metallic-roughness) workflow, which produces more realistic materials. glTF also supports animations, scene hierarchies, and morph targets — none of which OBJ supports. Converting OBJ to glTF brings your models into the modern PBR pipeline.
Last updated: August 2026. Format details reference the OBJ file specification and the glTF format overview.
Frequently Asked Questions
How do I convert OBJ to glTF?
Upload your .obj file using the converter above. Include the .mtl file for materials. The tool converts to glTF format. Download the .gltf file when complete.
Is this OBJ to glTF converter free?
Yes, completely free. No registration, no watermarks, no hidden costs.
What is the difference between OBJ and glTF?
OBJ is a text-based geometry format with separate .mtl material files. glTF is a modern 3D format by the Khronos Group that stores geometry, PBR materials, animations, and scenes. glTF supports PBR materials and animations; OBJ does not.
What is the difference between glTF and GLB?
glTF is a JSON-based format that references external binary (.bin) and texture files. GLB is a binary container that bundles the glTF JSON, buffers, and textures into a single file. glTF is editable; GLB is compact and deployment-ready.
How do I convert OBJ to glTF in Blender?
In Blender, go to File > Import > Wavefront (.obj). Then go to File > Export > glTF 2.0 (.gltf/.glb). Select .gltf format (not GLB) and click Export. Materials transfer automatically with PBR conversion.
Does converting OBJ to glTF preserve textures?
If the OBJ has a companion .mtl file with texture references, and textures are available, they are transferred to glTF. The textures may be embedded or referenced externally depending on the export settings.
Why convert OBJ to glTF instead of GLB?
glTF produces editable JSON output that you can inspect and modify. It separates geometry (.bin), textures, and metadata, making it easier to debug and optimize. GLB is better for final deployment to web or mobile.
Can I convert OBJ to glTF on Mac?
Yes. Our online converter works in any browser on macOS. Alternatively, use Blender on Mac.
What software opens glTF files?
glTF files can be opened by Blender, Three.js, Babylon.js, Facebook 3D Posts, Microsoft Paint 3D, Godot Engine, Unity (via plugin), and any glTF-compatible viewer.
Does glTF support PBR materials?
Yes. glTF uses the metallic-roughness PBR workflow as its default material model. OBJ/MTL materials (ambient, diffuse, specular) are converted to PBR-compatible properties during conversion.
Can I convert OBJ to glTF with animations?
No. OBJ format does not support animations. The converted glTF will be a static model. To create animated glTF, use Blender to add rigging and keyframes before exporting.
Is glTF better than OBJ for web 3D?
Yes. glTF is designed for web delivery with PBR materials, animations, and compact binary buffers. OBJ is a legacy text format with no animation support. For web 3D, glTF (or GLB) is always preferred.