glTF to USDZ converter
Updated September 2026
What is a glTF to USDZ converter?
Packed JSON in. Apple AR zip out.
A self-contained glTF becomes USDZ for Quick Look. Split .bin folders will not resolve. Pack to GLB first if the export wrote sidecars, or use this page when the JSON is already embedded.
How to convert glTF to USDZ
Packed .gltf, target USDZ, drop, download .usdz.
1
Drop a glTF file
Source is glTF. The File API reads it in this tab. Nothing is posted. Keep it under 80 MB.
2
Write USDZ
Packed glTF is written as USDZ.
3
Take the file to the next tool
Open on iPhone or iPad. Keep the glTF if you still edit JSON.
glTF versus USDZ on this route
This page is only glTF → USDZ. Other pairs have their own keep and lose notes so they do not repeat this conversion.
| On this conversion | What happens |
|---|---|
| Keeps | Mesh and PBR the writer can store. |
| Drops | Editable JSON. Split glTF folders are not fetched. |
| Next step | Quick Look on iOS. Pack to GLB if you still needed one web file. |
| Attribute | Result on the reference scene |
|---|---|
| Separate objects | Kept as 2 |
| UV coordinates | Kept |
| Vertex colour | Lost |
| Material names | Lost |
| Vertices on the reference scene | 72 of 48 |
| Mesh | Source | USDZ | Change | Vertices written |
|---|---|---|---|---|
| mug.glb | 880 KB | 2,927 KB | 3.3x | 150,000 |
| lion.glb | 8,768 KB | 30,487 KB | 3.5x | 1,496,202 |
glTF as the source: Materials and textures stay when the source has them. Measured 2026-09-13 by running this converter’s own loaders and exporters headlessly. How every format was measured.
glTF to USDZ stays in this tab
glTF is parsed with the File API. USDZ is written in memory. Editable JSON. Split glTF folders are not fetched. That is a format rule, not an upload. Files over 80 MB are refused because RAM is the limit.
glTF to USDZ questions
What is a glTF to USDZ converter?
A self-contained glTF becomes USDZ for Quick Look. Split .bin folders will not resolve. Pack to GLB first if the export wrote sidecars, or use this page when the JSON is already embedded.
How do I convert glTF to USDZ online?
Packed .gltf, target USDZ, drop, download .usdz. No Blender and no account.
Should I convert glTF to USDZ or to GLB first?
USDZ when the next step is Apple AR. GLB when the next step is the web. They are different jobs.
Why did my glTF fail to convert to USDZ?
Split exports with a sidecar .bin are not fetched. Export packed glTF or a GLB, then convert.
Are my 3D files uploaded?
No. glTF is parsed here and USDZ is written in memory. There is no convert API.
Can I view glTF without converting?
Yes. Open the glTF viewer if you only need to orbit. Convert when the next tool actually wants USDZ.
Convert glTF to USDZ, or inspect first
Quick Look on iOS. Pack to GLB if you still needed one web file.
