WebFaz 3D

USDZ to STL

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USDZ to STL: convert Apple’s file for printing

USDZ is Apple’s format for 3D models and Augmented Reality. Open the USDZ file and download the STL, which is what 3D printers and slicers accept. Reading covers USDZ with geometry in text or in binary. The conversion happens in the browser.

Demo model
Convert to STLGeometry only — for 3D printing

Size in the STL: 3,628.8 × 4,366.5 × 3,332.4 mm — too large for most printers: check the unit.

How to do it, step by step

  1. Open or drag the .usdz file.
  2. Check the model in the scene and the dimensions.
  3. Check the unit (Meters, for USDZ) and the “Size in the STL”.
  4. Click Convert and download.

See where to click, with an image of the tool →

When this is useful

Print an Augmented Reality model

Many models that appear in AR are distributed as USDZ.

Take an iPhone scan to the slicer

Convert the scan’s USDZ to STL to slice and print.

Tips for a good result

  • The downloaded file takes the USDZ’s name, with the .stl extension.
  • USDZ usually has textures and colors; STL does not carry them. If you need them, convert to GLB.

What this tool does not do

  • STL stores no colors or textures: only the shape. Colors from a scan are left out.
  • The app does not repair the model: it does not close holes, does not check whether the mesh is closed and does not trim parts. Scans usually have flaws, and the slicer (or a mesh editing program) may need to fix them.
  • The STL file does not store the unit. The app writes in millimeters, which is what most slicers expect, and shows the final size before downloading: check that it matches the real object.
  • Advanced USDZ features (such as animations and complex materials) may not be reproduced on reading; for the STL, only the shape matters.
  • Files of up to 400 MB. Everything is done in the browser, without sending the model.
  • The app converts and shows the model: it does not edit the mesh or the textures.

Frequently asked questions

Which USDZ files work?
USDZ with geometry in text (USDA) or binary (USDC), with textures inside the package. Loose .usdc, .usda and .usd files also open.
Does the number of triangles change?
No. In the test, the triangle count of the USDZ and the STL was the same.

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Text written by Marcelo Amantino · updated October 18, 2026 · who we are