Convert GLTF to OBJ Online (Free & Secure)
glTF to OBJ conversion on iLove3DM takes one upload and no account. Your glTF model, built from indexed triangle meshes with optional morph targets and skins, is rewritten as OBJ with materials mapped to what OBJ supports.
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⚡ AI Summary & Quick Answer
glTF to OBJ conversion on iLove3DM takes one upload and no account. Your glTF model, built from indexed triangle meshes with optional morph targets and skins, is rewritten as OBJ with materials mapped to what OBJ supports.
Taking a web-ready asset into a desktop modelling format is the classic hand-off from publishing back to production. glTF (.gltf) is a JSON scene description that references separate .bin and image files. It holds indexed triangle meshes with optional morph targets and skins and is most often opened in Blender, Visual Studio Code glTF tools, and three.js. OBJ (.obj) is plain ASCII text with a companion .mtl material file, holding polygons (triangles, quads and n-gons) with shared UV and normal pools, and is typically used in Blender, Maya, and 3ds Max.
The converter parses the glTF scene graph, normalises meshes and materials, and re-exports them as OBJ. Units change from meters (fixed by the glTF specification) to unitless (the importing application decides the scale). Everything runs in your browser or an isolated, auto-purged instance, so models stay private.
.gltfAbout glTF (JSON)
Standard open-source 3D scene description format using JSON with external or embedded buffers and textures.
- Structure: a JSON scene description that references separate .bin and image files
- Materials: PBR metallic-roughness materials
- Units: meters (fixed by the glTF specification)
- Axis: Y-up, right-handed
- Opens in: Blender, Cesium, three.js or any glTF 2.0 viewer
.objTarget format: OBJ (Wavefront)
Universal geometry definition format supported by almost every 3D modeling and rendering software.
- Structure: plain ASCII text with a companion .mtl material file
- Materials: Phong-style MTL materials (diffuse, specular, ambient)
- Units: unitless (the importing application decides the scale)
- Axis: conventionally Y-up, but not enforced
- Opens in: Blender, Maya, 3ds Max, ZBrush or MeshLab
What happens to your data in glTF → OBJ conversion
Conversion route: glTF → GLB → OBJ (parsed into a GLB scene, then exported as OBJ).
| Aspect | Result | Outcome |
|---|---|---|
| Geometry | Preserved | glTF stores indexed triangle meshes with optional morph targets and skins; OBJ stores polygons (triangles, quads and n-gons) with shared UV and normal pools. Surfaces are retriangulated where needed and positions, normals and UV coordinates are carried across. |
| Materials | Adapted | glTF uses PBR metallic-roughness materials. OBJ only supports Phong-style MTL materials (diffuse, specular, ambient), so values are mapped to the closest equivalent and advanced PBR channels may be simplified. |
| Textures | Adapted | In glTF, textures are stored as external image files or data URIs. In OBJ, texture images are referenced by file name from the MTL file, so texture handling is reduced to what the target supports. |
| Vertex colours | Adapted | Per-vertex colours from glTF are kept where OBJ allows them, but support in OBJ is limited and some viewers will ignore them. |
| Animation | Not supported | glTF provides skeletal, node and morph-target animation, but OBJ is a static format and animation is not exported. |
| Units & scale | Adapted | glTF uses meters (fixed by the glTF specification); OBJ uses unitless (the importing application decides the scale). Check the scale in your target application, and use the Scale tool if the model looks too big or too small. |
| Orientation | Adapted | glTF is Y-up, right-handed and OBJ is conventionally Y-up, but not enforced. The converter writes a consistent orientation, but verify the up axis in your target software. |
Expect the OBJ file to be roughly 3.3x larger than the glTF source, because OBJ is large, because every coordinate is stored as text.
Why convert glTF to OBJ?
Why leave glTF
People most often convert from glTF when they are moving a web asset into desktop tools. Other common cases include repackaging a multi-file glTF into a portable single file and inspecting or editing a scene by hand before shipping. In glTF → OBJ specifically, preserved: geometry; adapted: materials, textures, vertex colours, units & scale, and orientation; not supported by OBJ: animation. Expect the OBJ file to be roughly 3.3x larger than the glTF source, because OBJ is large, because every coordinate is stored as text.
Why choose OBJ
OBJ is the right target when you are sending geometry to sculpting and texturing software. It also fits scenarios such as exchanging a mesh with almost any 3D application and archiving a model in a simple, inspectable format. Taking a web-ready asset into a desktop modelling format is the classic hand-off from publishing back to production.
Where the result opens
After conversion you can open the .obj file in Blender, Maya, 3ds Max, ZBrush or MeshLab.
Step-by-Step Guide: glTF → OBJ
- 1
Upload your .gltf file
Drag your glTF model onto the converter or click to browse. Textures are stored as external image files or data URIs; zip the model with its textures and companion files if you want them included.
- 2
Check your free quota
Free accounts can run a few conversions per day; signing in unlocks tracking of your remaining uses. No watermark is ever added.
- 3
Convert to OBJ
Press the Convert to OBJ button. The pipeline follows glTF → GLB → OBJ (parsed into a GLB scene, then exported as OBJ), which usually takes a few seconds for models under 100 MB.
- 4
Download the .obj file
Your OBJ file downloads automatically. Open it in Blender and Maya to confirm scale and orientation.
Tips for glTF → OBJ
- Relative paths to .bin and texture files break when the files are separated (glTF source).
- Missing .mtl or texture files turn a model grey (OBJ target).
- Always verify real-world size: glTF is meters (fixed by the glTF specification), while OBJ is unitless (the importing application decides the scale).
- OBJ files grow quickly; compress or decimate the source with the Compress tool if size is a concern.
Frequently Asked Questions
How do I convert glTF to OBJ without losing quality?
Upload the .gltf file and press convert; the route is glTF → GLB → OBJ (parsed into a GLB scene, then exported as OBJ). Geometry is carried over exactly; materials are mapped to the closest OBJ equivalent, and textures stay linked through UV coordinates.
Does glTF to OBJ conversion keep textures?
In glTF, textures are stored as external image files or data URIs. In OBJ, texture images are referenced by file name from the MTL file, so texture handling is reduced to what the target supports.
Why does my OBJ model look the wrong size or rotation?
glTF uses meters (fixed by the glTF specification); OBJ uses unitless (the importing application decides the scale). Check the scale in your target application, and use the Scale tool if the model looks too big or too small. glTF is Y-up, right-handed and OBJ is conventionally Y-up, but not enforced. The converter writes a consistent orientation, but verify the up axis in your target software.
Will the OBJ file be bigger or smaller than my glTF file?
Expect the OBJ file to be roughly 3.3x larger than the glTF source, because OBJ is large, because every coordinate is stored as text.
What software can open the converted OBJ file?
OBJ files open in Blender, Maya, 3ds Max, ZBrush or MeshLab. If you need to go back, use the OBJ to glTF converter.
Is it safe to upload my glTF model?
Yes. Files are processed in your browser or on isolated instances and purged right after conversion. They are never used to train AI models, and no watermark is added.