Convert USDZ to STL - Free Online Converter
Drop a .usdz file below and download it as .stl in seconds. The conversion runs entirely in your browser - no upload, no signup, no watermark. The direct route from iPhone 3D scans and AR assets to your slicer.
Updated July 2026
Done in seconds
Your USDZ converts to STL locally in your browser - no upload queue, no waiting.
Private by design
Your file never leaves your device. Nothing is uploaded, nothing is stored.
Free, no strings
No signup, no watermark, no file limit - convert as many files as you need.
How to convert usdz to stl
Drop your USDZ file
Drag the .usdz file into the converter above or click to browse. No account and no upload - the file stays on your device.
Conversion runs in your browser
The model is parsed and rewritten locally, in seconds for typical files. Geometry is carried over 1:1 - no remeshing, no quality loss.
Download the STL
The .stl download starts from the same spot. Convert as many files as you like - there is no limit or watermark.
USDZ and STL, explained
What is USDZ?
USDZ is Apple's AR format: Pixar's Universal Scene Description packed into a single file that iPhones and iPads open natively in AR Quick Look - no app required. E-commerce product previews on Apple devices run on USDZ.
USDZ shines on Apple platforms and almost nowhere else, so the common workflows are converting a GLB into USDZ to ship an AR preview, or unpacking a USDZ back into GLB/OBJ to edit it in standard tools.
- Developed by
- Apple + Pixar (2018)
- Structure
- Uncompressed ZIP around Pixar USD scene data
- Used by
- iPhone/iPad AR Quick Look, Apple Vision Pro, e-commerce AR
What is STL?
STL is the oldest and most universal 3D printing format. It describes a model as a plain list of triangles - nothing else. No colors, no materials, no units, no object names. That simplicity is exactly why every slicer, CAD tool, and print service on earth accepts it.
An STL file stores each triangle as three corner points plus a facet normal, either as compact binary (the common case) or human-readable ASCII. Because the format carries no unit information, almost every tool assumes millimeters. When a file needs to work absolutely anywhere, STL is still the safe answer.
- Developed by
- 3D Systems (1987)
- Structure
- Binary or ASCII list of raw triangles
- Used by
- Every slicer, CAD package, mesh-repair tool, and 3D-printing marketplace
What survives the usdz to stl conversion
Format conversion is honest work: some data has nowhere to go in the target format. Here is exactly what carries over.
Mesh geometry
Every mesh in the USD scene carries over exactly, with transforms baked in. Apple's binary Crate files parse natively.
Real-world size
USDZ counts meters, slicers read STL as millimeters - a 5cm object arrives as 0.05 units. Scale ×1000 in your slicer and the real size is restored exactly.
Textures & materials
STL stores bare triangles - the photorealistic scan texture cannot come along (and printers don't need it).
Multiple objects
All meshes merge into one STL as separate shells - STL has no object separation.
When should you convert USDZ to STL?
Convert to STL to print what an iPhone scanned: Object Capture and LiDAR scan apps export USDZ, and no slicer reads it. This is the missing link between phone scanning and 3D printing.
Keep the USDZ for AR - it is the file iPhones open natively in Quick Look, textures and all. The STL is the print copy.
Only have a picture, not a 3D file? The image to STL converter turns photos and logos into printable models.
And if what you actually need is a new model rather than a new file format: 3D AI Studio's main tool can generate 3D models from photos with AI - with exports to every format on this page.
USDZ to STL - frequently asked questions
Made with 3D AI Studio
Need a new model to print, not just a new format?
3D AI Studio turns photos into print-ready 3D models. Upload a picture, get a watertight mesh you can slice - 100 free credits per month, no credit card.