Convert OBJ to USDZ Online (Free & Secure)
iLove3DM converts OBJ files to USDZ online and free: .obj in, .usdz out. OBJ is plain ASCII text with a companion .mtl material file, while USDZ is an uncompressed zip archive of USD scene data and textures; the converter bridges the two using GLB as an intermediate scene.
Select .OBJ file
or drag & drop .obj file here
Try the new iLove3DM Studio
Get a better experience in our new Studio: a full-screen 3D viewer, live preview and all tools in one workspace. This classic page keeps working as before.
⚡ AI Summary & Quick Answer
iLove3DM converts OBJ files to USDZ online and free: .obj in, .usdz out. OBJ is plain ASCII text with a companion .mtl material file, while USDZ is an uncompressed zip archive of USD scene data and textures; the converter bridges the two using GLB as an intermediate scene.
Legacy and DCC formats are heavy and awkward on the web; converting them gives you a compact asset that loads in any modern browser. OBJ (.obj) is plain ASCII text with a companion .mtl material file. It holds polygons (triangles, quads and n-gons) with shared UV and normal pools and is most often opened in Blender, Maya, and 3ds Max. USDZ (.usdz) is an uncompressed zip archive of USD scene data and textures, holding triangle and polygon meshes with Pixar USD scene structure, and is typically used in iOS AR Quick Look, Apple Vision Pro, and Reality Composer.
Because OBJ uses Phong-style MTL materials (diffuse, specular, ambient) while USDZ uses UsdPreviewSurface PBR materials, the converter reads your scene, applies the mapping described below and writes a clean .usdz file. Everything runs in your browser or an isolated, auto-purged instance, so models stay private.
.objAbout 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
.usdzTarget format: USDZ (Universal Scene Description Zip)
Apple and Pixar standard zero-compression zip archive optimized for Augmented Reality (AR Quick Look) on iOS and visionOS.
- Structure: an uncompressed zip archive of USD scene data and textures
- Materials: UsdPreviewSurface PBR materials
- Units: meters per unit, declared in the stage metadata
- Axis: Y-up
- Opens in: AR Quick Look, Reality Composer, Xcode or Blender with USD support
What happens to your data in OBJ → USDZ conversion
Conversion route: OBJ → GLB → USDZ (parsed into a GLB scene, then exported as USDZ).
| Aspect | Result | Outcome |
|---|---|---|
| Geometry | Preserved | OBJ stores polygons (triangles, quads and n-gons) with shared UV and normal pools; USDZ stores triangle and polygon meshes with Pixar USD scene structure. Surfaces are retriangulated where needed and positions, normals and UV coordinates are carried across. |
| Materials | Preserved | OBJ uses Phong-style MTL materials (diffuse, specular, ambient) and USDZ can represent the same information, so base colour and surface settings are preserved. |
| Textures | Preserved | In OBJ, texture images are referenced by file name from the MTL file. USDZ can reference or embed textures too, so images and UV mapping stay linked. |
| Vertex colours | Preserved | Per-vertex colours in OBJ are written to USDZ as vertex colour data. |
| Animation | Not applicable | OBJ is a static format, so the USDZ result is a single static pose. |
| Units & scale | Adapted | OBJ uses unitless (the importing application decides the scale); USDZ uses meters per unit, declared in the stage metadata. Check the scale in your target application, and use the Scale tool if the model looks too big or too small. |
| Orientation | Adapted | OBJ is conventionally Y-up, but not enforced and USDZ is Y-up. The converter writes a consistent orientation, but verify the up axis in your target software. |
Expect the USDZ file to be roughly 2.7x smaller than the OBJ source, since USDZ is medium, because the zip is stored without compression.
Why convert OBJ to USDZ?
Why leave OBJ
People most often convert from OBJ when they are moving a model out of ZBrush or Blender into a web pipeline. Other common cases include rescuing an old sculpt or archive from a text-based format and turning a vendor download into a modern, textured asset. In OBJ → USDZ specifically, preserved: geometry, materials, textures, and vertex colours; adapted: units & scale and orientation. Expect the USDZ file to be roughly 2.7x smaller than the OBJ source, since USDZ is medium, because the zip is stored without compression.
Why choose USDZ
USDZ is the right target when you are delivering assets to Apple developers. It also fits scenarios such as launching one-tap AR on iPhone, iPad and Apple Vision Pro and publishing Shopify or e-commerce AR previews. Legacy and DCC formats are heavy and awkward on the web; converting them gives you a compact asset that loads in any modern browser.
Where the result opens
After conversion you can open the .usdz file in AR Quick Look, Reality Composer, Xcode or Blender with USD support.
Step-by-Step Guide: OBJ → USDZ
- 1
Upload your .obj file
Drag your OBJ model onto the converter or click to browse. Texture images are referenced by file name from the MTL file; 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 USDZ
Press the Convert to USDZ button. The pipeline follows OBJ → GLB → USDZ (parsed into a GLB scene, then exported as USDZ), which usually takes a few seconds for models under 100 MB.
- 4
Download the .usdz file
Your USDZ file downloads automatically. Open it in iOS AR Quick Look and Apple Vision Pro to confirm scale and orientation.
Tips for OBJ → USDZ
- Missing .mtl or texture files turn a model grey (OBJ source).
- Only a subset of PBR features is supported by AR Quick Look (USDZ target).
- Always verify real-world size: OBJ is unitless (the importing application decides the scale), while USDZ is meters per unit, declared in the stage metadata.
- Since OBJ is much heavier than USDZ, converting is also a good way to shrink your asset.
Frequently Asked Questions
How do I convert OBJ to USDZ without losing quality?
Upload the .obj file and press convert; the route is OBJ → GLB → USDZ (parsed into a GLB scene, then exported as USDZ). Geometry is carried over exactly; materials are preserved, and textures stay linked through UV coordinates.
Does OBJ to USDZ conversion keep textures?
In OBJ, texture images are referenced by file name from the MTL file. USDZ can reference or embed textures too, so images and UV mapping stay linked.
Why does my USDZ model look the wrong size or rotation?
OBJ uses unitless (the importing application decides the scale); USDZ uses meters per unit, declared in the stage metadata. Check the scale in your target application, and use the Scale tool if the model looks too big or too small. OBJ is conventionally Y-up, but not enforced and USDZ is Y-up. The converter writes a consistent orientation, but verify the up axis in your target software.
Will the USDZ file be bigger or smaller than my OBJ file?
Expect the USDZ file to be roughly 2.7x smaller than the OBJ source, since USDZ is medium, because the zip is stored without compression.
What software can open the converted USDZ file?
USDZ files open in AR Quick Look, Reality Composer, Xcode or Blender with USD support. If you need to go back, use the USDZ to OBJ converter.
Is it safe to upload my OBJ 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.