USDZ to STL converter: the surface, as it is
Drop a .usdz and get one .stl file, converted in Blender on our server. The trip keeps the geometry and nothing more; the skeleton and the skin weights, the shape keys, the materials and the textures and vertex colours cannot come along. Free, no account, nothing to install.
How do I convert USDZ to STL?
Drop the file on this page, wait while the server converts it, and download one .stl file.
- 1Choose a .usdz. Files up to 50 MB.
- 2The converter opens it in Blender on our server and writes STL. Most files take under a minute; the page shows the result in 3D when it is done.
- 3Download one .stl file. The upload and the result are deleted 3 days later.
- In:
- .usdz, .usd, .usda, .usdc
- Out:
- one .stl file
- Keeps:
- the geometry
- Cost:
- free, no account
- The skeleton and the skin weights, the shape keys, the materials and the textures and vertex colours cannot be carried into STL.
What survives the trip
A .usdz is a self-contained USD package and is the form that always works; .usd, .usda and .usdc are taken too, zipped with their folder. Every path inside is checked before the file is opened: only relative paths that stay inside the upload are followed. Meshes, UsdPreviewSurface materials, skeletons and blend shapes are read; cameras and lights are not.
The result is a binary STL of every mesh in the file, merged into one solid, written in the pose the model holds. Materials, textures, bones and shape keys do not exist in STL and are not written.
USDZ and STL do not hold the same things, and the page says so before you upload: the trip keeps the geometry and nothing more, and the skeleton and the skin weights, the shape keys, the materials and the textures and vertex colours cannot come along. STL is what every slicer and every CAD tool reads.
What this conversion cannot do
Measured on real files, not assumed. Everything below is a property of the formats or of the pipeline, and knowing it beforehand is cheaper than discovering it in your 3D tool.
A USD that reaches outside its folder is refused
USD assembles scenes out of other files. An absolute path of any operating system, a web or file:// address, a path that climbs out of the folder, a layer referenced but not uploaded, or value clips get the whole conversion refused. Package the scene as a .usdz, or zip the folder.
Converted is not the same as printable
Nothing is repaired, thickened or made watertight. A model built for rendering is a set of open shells, and a slicer will show the holes. That is a modelling job or the repair step in your slicer, not a format conversion.
Uploads stop at 50 MB
A larger file is refused before anything is uploaded. Decimate a dense mesh or shrink the textures in your 3D tool first; neither changes the format.
Frequently asked questions
Are .usd, .usda and .usdc accepted, or only .usdz?
Yes, all four, as input. A loose layer with files beside it should be zipped with its folder; a .usdz goes in as it is.
My model has several parts. Do I get several files?
No, one STL with every mesh in it. Split it in your slicer or 3D tool if you want the parts apart.
Is anything uploaded, and for how long?
Yes: the file you drop goes to our server in New York, is converted there, and both the upload and the result are deleted 3 days after the conversion. Nothing is shared with anyone.
Can I look at the USDZ first?
Yes, without uploading anything: the USDZ viewer draws it in your browser. Open the USDZ viewer →
Can this become a VTuber avatar?
Not from STL: an avatar needs a skeleton, skin weights and a face that moves, and STL has no room for them. Convert the rigged source to VRM instead.
The other format pairs
All 50 are free, all run the same pipeline, and all say what they drop.
STL to GLB
STL in, GLB out, free: one file.
STL to FBX
STL in, FBX out, free: one file.
STL to OBJ
STL in, OBJ out, free: zipped with its files.
USDZ to GLB
USDZ in, GLB out, free: one file.
USDZ to FBX
USDZ in, FBX out, free: one file.
USDZ to OBJ
USDZ in, OBJ out, free: zipped with its files.
GLB to STL
GLB in, STL out, free: one file.
FBX to STL
FBX in, STL out, free: one file.
OBJ to STL
OBJ in, STL out, free: one file.
STL to PLY
STL in, PLY out, free: one file.
STL to DAE
STL in, DAE out, free: zipped with its files.
STL to USDZ
STL in, USDZ out, free: one file.
PLY to STL
PLY in, STL out, free: one file.
DAE to STL
DAE in, STL out, free: one file.
USDZ to PLY
USDZ in, PLY out, free: one file.
USDZ to DAE
USDZ in, DAE out, free: zipped with its files.
3MF to STL
3MF in, STL out, free: one file.
STL to 3MF
STL in, 3MF out, free: one file.
GLB to USDZ
GLB in, USDZ out, free: one file.
FBX to USDZ
FBX in, USDZ out, free: one file.
OBJ to USDZ
OBJ in, USDZ out, free: one file.
PLY to USDZ
PLY in, USDZ out, free: one file.
DAE to USDZ
DAE in, USDZ out, free: one file.
Only want to look at the file? GLB viewer, FBX viewer and OBJ viewer all run on your own device — nothing is uploaded.
Is your model going into VTubing?
Converting because the model is going into VTubing? STL is not the format those apps read. The same rigged file becomes a VRM with its humanoid bones mapped and its materials converted, in one step on the FBX to VRM converter.
Open the VRM converter