# OBJ to USDZ Converter

> Put textured OBJ models into AR on iPhone and iPad: OBJ to USDZ with the .mtl materials and textures packed in.

Page: https://printpal.io/convert/obj-to-usdz
Updated: 2026-11-12
Use it: open https://printpal.io/convert/obj-to-usdz in a browser and drop a file. Free, no account, files are processed locally and never uploaded.

Drop the .obj with its .mtl and textures, or a .zip. The converter writes a USDZ with every material and texture, recentered to sit on the floor in AR Quick Look.

OBJ has no units, so its numbers pass through as metres. A model made in millimetres for printing should have its file units set to millimetres first, or it will appear a thousand times too big.

## How to convert OBJ to USDZ

1. **Drop your OBJ files.** Drop the .obj with its .mtl and texture images, or a .zip of the folder.
2. **Check the preview.** The model appears at the size and orientation it will have. Fix the file units, up axis or size under Size, units and orientation if needed.
3. **Choose USDZ options.** Written in metres, Y up, sitting on the floor and centered, which is what AR Quick Look expects.
4. **Convert and download.** One file downloads straight away. A batch gives a download per file and one .zip of all of them.

## What carries over

| | Result |
|---|---|
| Geometry | Every face is kept; quads and n-gons are split into triangles. |
| Color | Kept: materials and textures, as PBR materials for AR Quick Look. |
| Units | OBJ has bare numbers, so they pass through as metres: 1 unit becomes 1 metre. If the preview size is wrong, set the file units. |
| Orientation | Both are Y up, so it stays the right way up. |
| Objects | Each part stays a separate object or mesh. |

## OBJ at a glance (Wavefront OBJ)

OBJ came out of Wavefront Technologies' animation software and became the plain-text lingua franca of 3D. The geometry is in the .obj; colors and texture references live in a companion .mtl file, which is why OBJs so often arrive grey.

- **Stores:** Vertices, faces (triangles, quads, n-gons), UVs and normals as text
- **Color:** Materials and textures in a separate .mtl file; vertex colors as an unofficial extension
- **Units:** None, the numbers are bare
- **Up axis:** Y by convention (Blender, Maya, most 3D apps)
- **File size:** Text: about a binary STL's size for bare geometry, up to twice that with UVs and normals
- **Opens in:** Blender, Maya, 3ds Max, ZBrush, Cinema 4D, game engines, most slicers

## USDZ at a glance (Universal Scene Description, zipped)

USDZ packages Pixar's Universal Scene Description for Apple's AR Quick Look: tap a .usdz on an iPhone and the model appears in your room at real size.

- **Stores:** A Pixar USD scene and its textures in an uncompressed zip
- **Color:** PBR materials and textures
- **Units:** Metres in this export
- **Up axis:** Y
- **Use:** AR Quick Look on iPhone, iPad, Mac and Vision Pro
- **Opens in:** Safari and Files on Apple devices, Reality Composer, Blender, Omniverse

## Tips

- **Check the size** The preview shows the size the USDZ will have.
- **Textures** Missing textures show as grey in the preview; add the files.
- **Android** Use [OBJ to GLB](https://printpal.io/convert/obj-to-glb) for Android.

## FAQ

### Does OBJ to USDZ keep textures?

Yes, with the .mtl and images dropped alongside.

### Why is the AR model huge?

The OBJ was in millimetres. Set the file units to millimetres and convert again.

### Does it need Reality Converter?

No, it runs in your browser on any computer.

### Is the converter free? Are there limits?

Free, with no sign-up, watermark or file count limit. Batches and files of a few hundred MB work on most laptops; the only limit is your device's memory.

### Are my files uploaded?

No. Files are read and written by JavaScript and WebAssembly in your browser and never sent to PrintPal. The STEP and IGES reader is the only extra download, once, from a public CDN.

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