OBJ to glTF converter
Convert OBJ to glTF free online for web 3D with separate JSON, binary, and texture files. Inspect scene structure, cache assets independently. No signup.
Drop a file to convert here
or click to browse
About GL Transmission Format
Common Use Cases
- Publishing OBJ models on the web with separate assets
- Inspecting 3D scene data as JSON
- Building web 3D pipelines with split asset files
OBJ is the most common desktop 3D format, but the web needs glTF. Converting OBJ to glTF gives you the open web standard with a human-readable JSON scene graph, separate binary geometry buffers, and standard image textures. This separation is ideal for web pipelines where you want to inspect, cache, and process each asset type independently.
OBJ is a text-based desktop mesh format. glTF is the open JSON-based web standard with separate binary and texture files, designed for efficient real-time rendering.
Why Convert OBJ to glTF?
Inspectable JSON scene structure
The .gltf file is plain JSON that you can open in any text editor. See every node, material, and mesh reference in a readable format.
Separate cacheable assets
Geometry buffers and textures are separate files, so CDNs can cache them independently and build tools can process each asset type in its own pipeline.
PBR material upgrade
OBJ Phong materials are mapped to glTF PBR metallic-roughness for better-looking results in web and AR renderers.
Open standard for the web
glTF is maintained by Khronos Group and supported by Three.js, Babylon.js, PlayCanvas, Google, Apple, and Meta for web and AR 3D.
When to use each
Use OBJ when...
- Desktop 3D editing workflows
- Simple text-based mesh storage
- Maximum desktop tool compatibility
- Quick mesh inspection
- Archiving static meshes
Use glTF when...
- Web 3D with inspectable JSON
- Separate assets for CDN caching
- PBR materials for web renderers
- Building web 3D asset pipelines
- Deploying to AR viewers on mobile
Common use cases
- Publishing OBJ models on the web with separate assets
- Inspecting 3D scene data as JSON
- Building web 3D pipelines with split asset files
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. OBJ geometry and materials are converted to glTF JSON with separate binary and texture files.
- Download your glTF. Save the .gltf and associated files. Load them in Three.js, Babylon.js, or any glTF viewer. Files are deleted from our servers within 1 hour.
Frequently asked questions
- What is the difference between glTF and GLB?
- glTF uses JSON plus separate binary and texture files. GLB packs everything into one binary. Use glTF for inspectable structure; use GLB for single-file simplicity.
- Are materials from .mtl converted?
- Yes. OBJ Phong materials are mapped to glTF PBR metallic-roughness. Textures are extracted as separate image files.
- Can I load the glTF in Three.js?
- Yes. Three.js has a built-in GLTFLoader that loads .gltf files and their associated buffers and textures.
- Is converting OBJ to glTF 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.