Free Online OBJ to GLB Converter
Convert OBJ and MTL files to a single self-contained GLB. Bundle geometry, materials, and textures for web 3D. Free, fast, no sign-up.
How to Convert OBJ to GLB
Upload Your OBJ File
Drag and drop your .obj file onto the converter above. If your model has a companion .mtl material file, include it for texture support.
Automatic Packaging
The converter bundles your OBJ geometry, MTL materials, and texture images into a single self-contained GLB binary file.
Download Your GLB
Once complete, download your GLB file and use it in any web 3D viewer, Three.js, Babylon.js, or Google Model Viewer.
Why Choose Our Converter
Free & No Sign-Up
Convert OBJ to GLB for free with no registration, no watermarks, and no hidden costs.
Self-Contained Output
OBJ requires separate .obj, .mtl, and texture files. GLB bundles everything into one compact binary file for easy deployment.
MTL Material Support
Materials defined in companion .mtl files are transferred to the GLB output with PBR-compatible properties.
Web-Ready Format
GLB is the standard format for web-based 3D. The output loads in Three.js, Babylon.js, Google Model Viewer, and WebXR.
2 Ways to Convert OBJ to GLB
Pick based on your need for material control and offline workflow.
Online OBJ to GLB Converter (This Tool)
Best for: quick, no-install conversion
- Drag and drop your .obj file (and .mtl if available).
- Wait for the automatic conversion.
- Download the self-contained GLB file.
Pros: Free, no software install, bundles OBJ+MTL+textures into one file.
Cons: Requires internet. Complex materials may need manual adjustment.
Blender (Free Desktop Software)
Best for: material control
- Open Blender and import OBJ (File > Import > Wavefront).
- Verify materials loaded correctly.
- Go to File > Export > glTF 2.0 (.glb).
- Select .glb format and click Export.
Pros: Free. Full material editing before export. Can fix texture issues.
Cons: Requires installing Blender.
Quick Checks Before You Convert
OBJ → GLB bundles geometry and materials. A 30-second review prevents texture loss and broken materials.
Include MTL File
OBJ files reference materials through companion .mtl files. Without the .mtl, the GLB output will have default grey materials. Ensure both .obj and .mtl are uploaded together.
Texture Image Paths
MTL files reference texture images by file path. Ensure texture files are accessible and paths are relative, not absolute. Missing textures produce an untextured GLB.
UV Coordinates
OBJ files may or may not include UV coordinates. Without UVs, textures cannot map correctly on the model. Check that your OBJ exporter includes UV data.
Mesh Quality
Check for non-manifold geometry and duplicate vertices in the OBJ. Clean meshes produce better GLB output for web rendering performance.
OBJ vs GLB Format Comparison
| Feature | OBJ | GLB |
|---|---|---|
| Full name | Wavefront Object | glTF Binary |
| Maintained by | Wavefront Technologies | Khronos Group |
| Structure | Text-based (vertices + faces) | Binary container |
| Color / texture | Yes (MTL + image files) | Yes (embedded) |
| Per-vertex normals | Yes | Yes |
| Animations | No | Yes |
| Multiple objects | Yes (named groups) | Yes (nodes) |
| File size | Larger (text-based) | Smaller (binary, compact) |
| Primary use | CAD, animation, scanning | Web 3D, AR/VR, mobile |
| Web browser support | Requires Three.js loader | Native WebGL support |
Fixing Common Issues After Conversion
Typical errors after OBJ → GLB and how to resolve them.
GLB model has no textures
The MTL file or texture images were not included. Ensure you upload the .obj, .mtl, and all texture image files together. Alternatively, use Blender to import OBJ+MTL and verify textures before exporting GLB.
Textures appear wrong or stretched
UV mapping may be incorrect or missing in the OBJ file. Use Blender to import the OBJ, check UV coordinates in Edit Mode, fix if needed, then export as GLB.
GLB file is very large
OBJ is text-based and verbose. The converted GLB binary is more compact, but texture images can still be large. Use Blender's Draco compression in glTF export settings to reduce size.
Materials look different in web viewer
OBJ/MTL materials use a simpler model than GLB PBR. Some material effects may look different. Use Blender to convert materials to Principled BSDF before exporting GLB.
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. It is the most widely supported 3D format for CAD, animation, and 3D scanning.
Developed by Wavefront Technologies in the 1990s, OBJ stores 3D mesh data in a human-readable text format. Material definitions live in a companion .mtl file, which references texture images (PNG, JPG). Virtually every 3D application — Blender, Maya, 3ds Max, MeshLab, ZBrush, Cinema 4D — can import and export OBJ files.
OBJ vs GLB: why convert?
OBJ is richer than STL but less web-friendly than GLB. OBJ requires multiple files (.obj, .mtl, textures) which makes web deployment difficult. GLB bundles everything into one compact binary file, loads natively in web browsers via Three.js and Babylon.js, and supports PBR materials and animations. For web 3D, AR/VR, and mobile applications, GLB is always preferred over OBJ.
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 GLB?
Upload your .obj file using the converter above. If you have a companion .mtl material file, include it. The tool bundles geometry and materials into a single GLB file. Once complete, download the GLB.
Is this OBJ to GLB converter free?
Yes, completely free. No registration, no watermarks, no hidden costs.
Does converting OBJ to GLB preserve textures?
If the OBJ has a companion .mtl file with texture references, and the texture images are available, they will be embedded in the GLB output. GLB is self-contained, so all textures are bundled inside the file.
What is the difference between OBJ and GLB?
OBJ is a text-based 3D format that requires separate .mtl material files and texture images. GLB is a binary container that bundles geometry, materials, textures, and animations into a single compact file. GLB is optimized for web delivery; OBJ is for 3D editing exchange.
How do I convert OBJ to GLB in Blender?
In Blender, go to File > Import > Wavefront (.obj) to import your OBJ. Then go to File > Export > glTF 2.0 (.glb/.gltf). Select .glb format and click Export. Materials and textures transfer automatically.
What is OBJ MTL to GLB?
OBJ files store geometry, while MTL (Material Template Library) files store material definitions. Converting 'OBJ MTL to GLB' means bundling both the geometry from OBJ and materials from MTL into a single GLB file with embedded textures.
Can I convert OBJ to GLB with textures?
Yes. Upload your .obj file along with the .mtl material file and texture images. The converter embeds all texture data into the GLB output, producing a self-contained file that displays correctly in any web 3D viewer.
Why convert OBJ to GLB?
OBJ requires multiple files (.obj, .mtl, textures) which makes web deployment difficult. GLB bundles everything into one file, is 30% smaller, and loads natively in web browsers via Three.js and Babylon.js. For web 3D, GLB is always preferred over OBJ.
Can I convert OBJ to GLB on Mac?
Yes. Our online converter works in any browser on macOS. Alternatively, use Blender on Mac to convert manually.
What OBJ files can be converted to GLB?
Any OBJ file with valid mesh geometry can be converted to GLB. For best results, include the companion .mtl material file and texture images. OBJ files without UV coordinates will produce untextured GLB output.
How long does OBJ to GLB conversion take?
Conversion typically completes in seconds. OBJ files are parsed and repackaged as GLB binary, which is faster than formats requiring server-side processing. Large OBJ files with many textures may take slightly longer.
Does GLB support animations from OBJ?
OBJ format does not support animations. The converted GLB will contain only static geometry and materials. To create animated GLB files, use Blender to add rigging and keyframes before exporting.
Need More Options?
Open the full Convert Studio to convert between every supported 3D format — GLB, glTF, OBJ, PLY, FBX, 3MF, USDZ and more.
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