STL to USDZ converter
Updated September 2026
What is an STL to USDZ converter?
Print triangles in. Apple AR zip out.
A slicer file can still be previewed in AR. This page wraps STL triangles in USDZ. There is no color to keep. Repair is not included.
How to convert STL to USDZ
Source STL, target USDZ, preview, download .usdz.
1
Drop a STL file
Source is STL. The File API reads it in this tab. Nothing is posted. Keep it under 80 MB.
2
Write USDZ
Binary STL triangles are written into USDZ.
3
Take the file to the next tool
Open on iOS. Slice from the original STL.
STL versus USDZ on this route
This page is only STL → USDZ. Other pairs have their own keep and lose notes so they do not repeat this conversion.
| On this conversion | What happens |
|---|---|
| Keeps | The triangle hull, in a Quick Look zip. |
| Drops | Nothing STL had for color. STL has none. |
| Next step | Quick Look. Keep the STL for the slicer. |
| 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 |
STL as the source: Default material on export. Source has no PBR to keep. Measured 2026-09-13 by running this converter’s own loaders and exporters headlessly. How every format was measured.
STL to USDZ stays in this tab
STL is parsed with the File API. USDZ is written in memory. Nothing STL had for color. STL has none. That is a format rule, not an upload. Files over 80 MB are refused because RAM is the limit.
STL to USDZ questions
What is an STL to USDZ converter?
A slicer file can still be previewed in AR. This page wraps STL triangles in USDZ. There is no color to keep. Repair is not included.
How do I convert STL to USDZ online?
Source STL, target USDZ, preview, download .usdz. No Blender and no account.
Why convert STL to USDZ?
When you want to show a print hull on an iPhone. Keep STL for the bureau or slicer.
Does STL to USDZ add color?
No. A default material is applied. Paint never lived in the STL.
Are my 3D files uploaded?
No. STL is parsed here and USDZ is written in memory. There is no convert API.
Can I view STL without converting?
Yes. Open the STL viewer if you only need to orbit. Convert when the next tool actually wants USDZ.
Convert STL to USDZ, or inspect first
Quick Look. Keep the STL for the slicer.
