Convert USDZ to 3MF Online (Free & Secure)
To convert USDZ to 3MF, drop your .usdz file on this page and download a .3mf file seconds later. The route is USDZ → GLB → 3MF (parsed into a GLB scene, then exported as 3MF), and geometry and materials are carried across where 3MF allows.
Select .USDZ file
or drag & drop .usdz file here
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⚡ AI Summary & Quick Answer
To convert USDZ to 3MF, drop your .usdz file on this page and download a .3mf file seconds later. The route is USDZ → GLB → 3MF (parsed into a GLB scene, then exported as 3MF), and geometry and materials are carried across where 3MF allows.
Web assets are optimised for screens, so the conversion has to flatten materials and produce geometry a slicer can accept. USDZ (.usdz) is an uncompressed zip archive of USD scene data and textures. It holds triangle and polygon meshes with Pixar USD scene structure and is most often opened in iOS AR Quick Look, Apple Vision Pro, and Reality Composer. 3MF (.3mf) is a zip package of XML model data and thumbnails, holding indexed triangle meshes with build items and component assemblies, and is typically used in Bambu Studio, PrusaSlicer, and Cura.
Under the hood, the USDZ file is decoded into an in-memory scene, then serialised as 3MF. The axis convention moves from Y-up to Z-up, matching the print bed. Everything runs in your browser or an isolated, auto-purged instance, so models stay private.
.usdzAbout USDZ (Universal Scene Description Zip)
Apple and Pixar standard zero-compression zip archive optimized for Augmented Reality (AR Quick Look) on iOS and visionOS.
- Structure: an uncompressed zip archive of USD scene data and textures
- Materials: UsdPreviewSurface PBR materials
- Units: meters per unit, declared in the stage metadata
- Axis: Y-up
- Opens in: AR Quick Look, Reality Composer, Xcode or Blender with USD support
.3mfTarget format: 3MF (3D Manufacturing Format)
Modern successor to STL for additive manufacturing. Contains color, materials, multi-part assemblies, and slice data.
- Structure: a zip package of XML model data and thumbnails
- Materials: base materials, colour groups and multi-material assignments
- Units: millimeters (declared in the model file)
- Axis: Z-up, matching the print bed
- Opens in: Bambu Studio, PrusaSlicer, Cura or Windows 3D Builder
What happens to your data in USDZ → 3MF conversion
Conversion route: USDZ → GLB → 3MF (parsed into a GLB scene, then exported as 3MF).
| Aspect | Result | Outcome |
|---|---|---|
| Geometry | Preserved | USDZ stores triangle and polygon meshes with Pixar USD scene structure; 3MF stores indexed triangle meshes with build items and component assemblies. Surfaces are retriangulated where needed and positions, normals and UV coordinates are carried across. |
| Materials | Adapted | USDZ uses UsdPreviewSurface PBR materials. 3MF only supports base materials, colour groups and multi-material assignments, so values are mapped to the closest equivalent and advanced PBR channels may be simplified. |
| Textures | Adapted | In USDZ, textures are packed inside the archive. In 3MF, texture and colour support exists but is mainly used for print colouring, so texture handling is reduced to what the target supports. |
| Vertex colours | Preserved | Per-vertex colours in USDZ are written to 3MF as vertex colour data. |
| Animation | Not supported | USDZ provides basic skeletal and transform animation, but 3MF is a static format and animation is not exported. |
| Units & scale | Adapted | USDZ uses meters per unit, declared in the stage metadata; 3MF uses millimeters (declared in the model file). Check the scale in your target application, and use the Scale tool if the model looks too big or too small. |
| Orientation | Adapted | USDZ is Y-up and 3MF is Z-up, matching the print bed. The converter writes a consistent orientation, but verify the up axis in your target software. |
Expect the 3MF file to be roughly 1.6x smaller than the USDZ source, since 3MF is compact, because the XML is zipped.
Why convert USDZ to 3MF?
Why leave USDZ
People most often convert from USDZ when they are using an iPhone scan or AR asset in a web or Android pipeline. Other common cases include opening a Reality Composer model in Blender or three.js and extracting textures from an AR package. In USDZ → 3MF specifically, preserved: geometry and vertex colours; adapted: materials, textures, units & scale, and orientation; not supported by 3MF: animation. Expect the 3MF file to be roughly 1.6x smaller than the USDZ source, since 3MF is compact, because the XML is zipped.
Why choose 3MF
3MF is the right target when you are delivering a model with correct millimeter scale to a slicer. It also fits scenarios such as multi-colour and multi-material 3D printing and replacing STL with a smaller, richer print format. Web assets are optimised for screens, so the conversion has to flatten materials and produce geometry a slicer can accept.
Where the result opens
After conversion you can open the .3mf file in Bambu Studio, PrusaSlicer, Cura or Windows 3D Builder.
Step-by-Step Guide: USDZ → 3MF
- 1
Upload your .usdz file
Drag your USDZ model onto the converter or click to browse. Textures are packed inside the archive; no extra files are required.
- 2
Check your free quota
Free accounts can run a few conversions per day; signing in unlocks tracking of your remaining uses. No watermark is ever added.
- 3
Convert to 3MF
Press the Convert to 3MF button. The pipeline follows USDZ → GLB → 3MF (parsed into a GLB scene, then exported as 3MF), which usually takes a few seconds for models under 100 MB.
- 4
Download the .3mf file
Your 3MF file downloads automatically. Open it in Bambu Studio and PrusaSlicer to confirm scale and orientation.
Tips for USDZ → 3MF
- Outside the Apple ecosystem few editors can open it (USDZ source).
- Multi-material assignments rarely map to other formats (3MF target).
- Always verify real-world size: USDZ is meters per unit, declared in the stage metadata, while 3MF is millimeters (declared in the model file).
Frequently Asked Questions
How do I convert USDZ to 3MF without losing quality?
Upload the .usdz file and press convert; the route is USDZ → GLB → 3MF (parsed into a GLB scene, then exported as 3MF). Geometry is carried over exactly; materials are mapped to the closest 3MF equivalent, and textures stay linked through UV coordinates.
Does USDZ to 3MF conversion keep textures?
In USDZ, textures are packed inside the archive. In 3MF, texture and colour support exists but is mainly used for print colouring, so texture handling is reduced to what the target supports.
Why does my 3MF model look the wrong size or rotation?
USDZ uses meters per unit, declared in the stage metadata; 3MF uses millimeters (declared in the model file). Check the scale in your target application, and use the Scale tool if the model looks too big or too small. USDZ is Y-up and 3MF is Z-up, matching the print bed. The converter writes a consistent orientation, but verify the up axis in your target software.
Will the 3MF file be bigger or smaller than my USDZ file?
Expect the 3MF file to be roughly 1.6x smaller than the USDZ source, since 3MF is compact, because the XML is zipped.
What software can open the converted 3MF file?
3MF files open in Bambu Studio, PrusaSlicer, Cura or Windows 3D Builder. If you need to go back, use the 3MF to USDZ converter.
Is it safe to upload my USDZ model?
Yes. Files are processed in your browser or on isolated instances and purged right after conversion. They are never used to train AI models, and no watermark is added.