Convert AMF to USDZ
Free AMF to USDZ converter that runs in your browser. See real dimensions before you download.
How to convert AMF to USDZ
- Drop your AMF file onto the converter — it opens in your browser, nothing is uploaded.
- Check the preview and the dimensions in mm; fix units or the up axis in “Units & orientation” if the size or orientation looks wrong.
- Choose USDZ as the output and click Convert. Several files download as one ZIP.
What carries over from AMF to USDZ
| AMF | USDZ | Result | |
|---|---|---|---|
| Colour / materials | Yes | Yes | Kept |
| Textures | No | Yes | — |
| Units stored in file | Yes | Yes | Written as mm → metres |
| Separate parts | Yes | Yes | Kept |
| Usual up axis | Z | Y | Rotated (switchable) |
About AMF files
AMF was standardised as ASTM F2915 and later ISO/ASTM 52915, with the aim of fixing the shortcomings of STL for additive manufacturing. A file is XML, optionally compressed as a ZIP, and describes one or more objects made of a vertex list and volumes of triangles. Unlike STL, it declares units, such as millimetre, inch or micrometre, and can attach colours and materials to volumes or even to individual triangles, with gradients between them. The specification also allows curved triangles, constellations that arrange several objects, and custom metadata. In practice it was overtaken by 3MF, which came from industry backers and gained support in Windows and the main slicers. AMF files still appear from some multi-material printers and research tools, and from older exporters in Cura, Slic3r and Meshmixer.
About USDZ files
USD, Universal Scene Description, was created at Pixar for film production and released as open source in 2016. USDZ was introduced by Apple and Pixar in 2018 as a single-file, uncompressed and unencrypted zip archive that packs a USD scene with its textures so it can be delivered and displayed without extra files. Apple built USDZ into iOS, iPadOS, macOS and visionOS: tapping a .usdz link in Safari or Messages opens AR Quick Look, where the object can be placed in the room at real-world scale. The file format is aligned with USD's metersPerUnit and upAxis metadata, and uses physically based UsdPreviewSurface materials. Retailers use it for product previews, and the format also appears in Reality Composer, Xcode and Blender's USD exporter. It is a viewing and AR format, so it plays no role in slicing.
3D printing notes
AMF is mainly useful when a tool hands you one. Several older slicers, including Slic3r and its descendants, can import it, and it carries units, so size is less ambiguous than with STL. Colours and materials may carry over to multi-material slicers, but support is uneven, so check the result on the plate before printing. If the destination is Bambu Studio or OrcaSlicer, 3MF is the better route. MeshShift reads AMF and writes AMF in the browser, and the same file can be converted to 3MF or STL. Run the print check for holes or non-manifold edges before slicing, since AMF does not guarantee a closed mesh any more than STL does.
Frequently asked questions
Is this AMF to USDZ converter free and private?
Yes. The conversion runs in your browser with JavaScript and WebAssembly, so your AMF file is never uploaded to a server. There is no sign-up, no watermark and no daily limit; very large files are limited only by your device's memory.
Is AMF better than STL?
On paper, yes: it has units, colour, materials and several objects. In practice STL is accepted everywhere and AMF is not, and 3MF now fills the same role with much wider support. Use AMF only when a specific tool or workflow requires it.
How do I view a USDZ file on iPhone?
Open it from Files, Messages, Mail or a Safari link and tap it; AR Quick Look starts, and you can place the model in your room at real-world scale with the camera. No app install is needed on supported iPhones and iPads.