Free OBJ to GLTF Converter
Lightning-fast OBJ to GLTF conversion — 100% in your browser. Your files never leave your device. Free, no watermark, no sign-up.
Upload 3D Model
Drag and drop or click to upload. Files are processed locally in your browser.
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Supports GLB, GLTF, OBJ, STL, FBX, PLY
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OBJ vs GLTF
See what transfers when converting between these two formats.
| Feature | OBJ | GLTF |
|---|---|---|
| Geometry | ||
| Textures | ||
| Materials | ||
| Animation | ||
| Rigging |
All features supported by OBJ are preserved in GLTF.
Why convert OBJ to GLTF?
Editable, source-control friendly assets
GLTF separates geometry, materials, and textures into diffable files. Track changes to a model in git — impossible with binary OBJ+MTL.
Pre-process for game engines
Run the GLTF through gltfpack or glTF-Transform to apply mesh compression, texture baking, or material cleanup before importing into Unity or Unreal.
Validate against the glTF spec
GLTF can be checked with the official glTF Validator. Useful for catching geometry or material issues before shipping to production.
Tips for OBJ → GLTF
Keep the .gltf folder intact
GLTF references external .bin buffers and texture images by relative URI. Move all files together — broken URIs produce a non-loading model.
Textures and materials are preserved
OBJ's diffuse/normal/roughness maps become glTF's baseColor/normal/metallicRoughness maps. PBR-specific maps OBJ lacks (emissive, clearcoat) are absent.
Re-bundle to GLB for delivery
Once you've validated or edited the GLTF, convert to GLB to ship a single file. The round-trip is lossless.
Use glTF Validator after conversion
Drop the .gltf into the online validator to catch issues like missing accessors, broken buffer views, or invalid material values.
Common issues when converting OBJ to GLTF
Textures do not render
Fix
The .mtl references texture files that were not uploaded alongside the .obj. Re-upload with the full folder. If textures use absolute paths, edit the .mtl to use relative paths first.
Validator reports 'BUFFER_VIEW_TARGET' warnings
Fix
Some OBJ exporters produce slightly non-standard data. The warnings are usually harmless for rendering but may block strict engine importers. Run the GLTF through glTF-Transform's `dedup` and `weld` commands to clean up.
File count is overwhelming
Fix
GLTF produces one .gltf, one .bin, and one file per texture — easily 10+ files for a complex model. Convert to GLB if you only need to ship the asset.