Convert glTF to USDZ
Free glTF to USDZ converter that runs in your browser. See real dimensions before you download.
How to convert glTF to USDZ
- Drop your glTF file (with its textures, if separate) 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 glTF to USDZ
| glTF | USDZ | Result | |
|---|---|---|---|
| Colour / materials | Yes | Yes | Kept |
| Textures | Yes | Yes | Kept |
| Units stored in file | Yes | Yes | Written as mm → metres |
| Separate parts | Yes | Yes | Kept |
| Usual up axis | Y | Y | Unchanged |
About glTF files
glTF was developed by the Khronos Group, the body behind OpenGL and Vulkan, and version 2.0 was released in 2017 and later adopted as ISO/IEC 12113. The design goal was a lean transmission format that engines can load without heavy processing. In its text form, a .gltf file is JSON that lists scenes, nodes, meshes, materials, animations and accessors, and it points to external .bin buffers and image files, though buffers can also be embedded as base64 data. The same content packed into one file is called GLB. Because the JSON is readable, glTF is popular for tooling, pipelines and debugging, and for projects that want to diff or hand-edit assets. It uses metres, a right-handed coordinate system and +Y up, and its physically based materials are supported by most web and game engines.
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
glTF is a display format, so a slicer will not open it. Convert it to STL or 3MF first. As with GLB, the main traps are metres versus millimetres and the Y-up axis. A character exported from a game pipeline can also contain separate shells for eyes, clothing and hair that overlap; slicers see overlapping volumes and may print them unevenly. MeshShift reads glTF in the browser, shows dimensions, applies the ×1000 metre-to-millimetre scale by default, and rotates the model upright. The print check rebuilds a single closed solid when you need one. When writing glTF, MeshShift embeds the buffers, so the output is a single self-contained file.
Frequently asked questions
Is this glTF to USDZ converter free and private?
Yes. The conversion runs in your browser with JavaScript and WebAssembly, so your glTF 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.
Should I use glTF or GLB?
Choose GLB when you want to share, upload or ship one file with textures inside. Choose glTF when you need to read or edit the JSON, keep textures separate, or let a version control system show changes. Both are the same standard and convert losslessly.
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.