GLB to USDZ converter
Updated September 2026
What is a GLB to USDZ converter?
Web scene in. Apple AR zip out.
iPhone and iPad open USDZ in Files, Messages, and Safari. This page reads a GLB and writes that zip in the tab. Empty geometry is refused. Keep GLB for the web; use this route when the next step is Quick Look.
How to convert GLB to USDZ
Source GLB, target USDZ, drop the .glb, download a .usdz.
1
Drop a GLB file
Source is GLB. The File API reads it in this tab. Nothing is posted. Keep it under 80 MB.
2
Write USDZ
The in-memory GLB scene is written as a USDZ zip of USDA.
3
Take the file to the next tool
Open the USDZ on an iPhone or iPad. Keep the GLB for the web.
GLB versus USDZ on this route
This page is only GLB → 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 USDZ writer can store. |
| Drops | The single-file web pack. You now have a Quick Look zip. |
| Next step | AirDrop or iMessage the USDZ. Keep the GLB for the web viewer. |
| 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 |
GLB 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.
GLB to USDZ stays in this tab
GLB is parsed with the File API. USDZ is written in memory. The single-file web pack. You now have a Quick Look zip. That is a format rule, not an upload. Files over 80 MB are refused because RAM is the limit.
GLB to USDZ questions
What is a GLB to USDZ converter?
iPhone and iPad open USDZ in Files, Messages, and Safari. This page reads a GLB and writes that zip in the tab. Empty geometry is refused. Keep GLB for the web; use this route when the next step is Quick Look.
How do I convert GLB to USDZ online?
Source GLB, target USDZ, drop the .glb, download a .usdz. No Blender and no account.
When should I convert GLB to USDZ?
When the destination is Apple Quick Look. Keep GLB for the web, a game engine, or this site’s viewer.
Does GLB to USDZ keep materials?
PBR that the USDZ writer stores can survive. Clips and extras the USDA stage does not carry are dropped.
Are my 3D files uploaded?
No. GLB is parsed here and USDZ is written in memory. There is no convert API.
Can I view GLB without converting?
Yes. Open the GLB viewer if you only need to orbit. Convert when the next tool actually wants USDZ.
Convert GLB to USDZ, or inspect first
AirDrop or iMessage the USDZ. Keep the GLB for the web viewer.
