Convert GLTF to USDZ Online (Free & Secure)
glTF to USDZ 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 USDZ with its materials intact.
Select .GLTF file
or drag & drop .gltf file here
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⚡ AI Summary & Quick Answer
glTF to USDZ 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 USDZ with its materials intact.
Both formats target real-time viewing, which keeps PBR materials intact and leaves mostly packaging differences to handle. 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. 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.
The converter parses the glTF scene graph, normalises meshes and materials, and re-exports them as USDZ. Units change from meters (fixed by the glTF specification) to meters per unit, declared in the stage metadata. 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
.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 glTF → USDZ conversion
Conversion route: glTF → GLB → USDZ (parsed into a GLB scene, then exported as USDZ).
| Aspect | Result | Outcome |
|---|---|---|
| Geometry | Preserved | glTF stores indexed triangle meshes with optional morph targets and skins; 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 | glTF uses PBR metallic-roughness materials and USDZ can represent the same information, so base colour and surface settings are preserved. |
| Textures | Preserved | In glTF, textures are stored as external image files or data URIs. USDZ can reference or embed textures too, so images and UV mapping stay linked. |
| Vertex colours | Adapted | Per-vertex colours from glTF are kept where USDZ allows them, but support in USDZ is limited and some viewers will ignore them. |
| Animation | Adapted | glTF provides skeletal, node and morph-target animation. USDZ supports only basic skeletal and transform animation, so complex rigs may be simplified. |
| Units & scale | Adapted | glTF uses meters (fixed by the glTF specification); 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 | glTF is Y-up, right-handed and USDZ is Y-up. The converter writes a consistent orientation, but verify the up axis in your target software. |
glTF and USDZ produce files of broadly similar size for the same mesh; glTF is similar to GLB, but split across several files, while USDZ is medium, because the zip is stored without compression.
Why convert glTF to USDZ?
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 → USDZ specifically, preserved: geometry, materials, and textures; adapted: vertex colours, animation, units & scale, and orientation. glTF and USDZ produce files of broadly similar size for the same mesh; glTF is similar to GLB, but split across several files, while USDZ is medium, because the zip is stored without compression.
Why choose USDZ
USDZ is the right target when you are launching one-tap AR on iPhone, iPad and Apple Vision Pro. It also fits scenarios such as publishing Shopify or e-commerce AR previews and delivering assets to Apple developers. Both formats target real-time viewing, which keeps PBR materials intact and leaves mostly packaging differences to handle.
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: glTF → USDZ
- 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 USDZ
Press the Convert to USDZ button. The pipeline follows glTF → 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 glTF → USDZ
- Relative paths to .bin and texture files break when the files are separated (glTF source).
- Only a subset of PBR features is supported by AR Quick Look (USDZ target).
- Always verify real-world size: glTF is meters (fixed by the glTF specification), while USDZ is meters per unit, declared in the stage metadata.
Frequently Asked Questions
How do I convert glTF to USDZ without losing quality?
Upload the .gltf file and press convert; the route is glTF → 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 glTF to USDZ conversion keep textures?
In glTF, textures are stored as external image files or data URIs. 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?
glTF uses meters (fixed by the glTF specification); 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. glTF is Y-up, right-handed 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 glTF file?
glTF and USDZ produce files of broadly similar size for the same mesh; glTF is similar to GLB, but split across several files, while 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 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.