USDZ vs OBJ
USDZ is a modern packaged format for AR on Apple devices, carrying PBR materials and textures in one file. OBJ is a very old, simple mesh format with separate material and texture files. To put a static model into AR on iPhone, USDZ is the format you need; OBJ is a convenient source to convert from, and our OBJ to USDZ converter does exactly that.
Side by side
| USDZ | OBJ | |
|---|---|---|
| Full name | Universal Scene Description, zipped | Wavefront OBJ |
| Created by | Pixar's USD, packaged by Apple and Pixar | Wavefront Technologies |
| Introduced | 2018 | late 1980s |
| Encoding | uncompressed ZIP of USD files and textures | plain text, with a separate .mtl file |
| File size | medium | large for dense meshes, because it's text |
| Materials | Yes | Yes |
| Textures | Yes | No |
| Animation | Yes | No |
| Colour | PBR materials and embedded textures | basic materials in a separate .mtl file |
| Units | metres in our export | unitless |
| Best for | iPhone and iPad AR Quick Look and Apple Vision Pro | older 3D software and CAD-adjacent tools |
Choose USDZ when
- •You want the model to open in AR Quick Look on iPhone or iPad.
- •You want textures packed into a single file.
- •You're working with Apple's Reality tools.
Choose OBJ when
- •You need a simple mesh for older tools.
- •You're going to edit the geometry in a 3D app.
- •The destination isn't an Apple device.
Which apps open them
Of the 15 3D apps in our software guides, 4 open USDZ without conversion and 14 open OBJ. Only OBJ opens directly in Unity, Godot, 3ds Max, Roblox Studio, Bambu Studio, OrcaSlicer, PrusaSlicer, UltiMaker Cura, PowerPoint, Sketchfab.
Questions
- Is USDZ better than OBJ?
- Neither is better everywhere. You want the model to open in AR Quick Look on iPhone or iPad: choose USDZ. You need a simple mesh for older tools: choose OBJ.
- Can I convert USDZ to OBJ?
- We convert OBJ to USDZ, but not the other way yet. Export OBJ from the app that made the USDZ file instead.
- Which file is smaller, USDZ or OBJ?
- USDZ: medium. OBJ: large for dense meshes, because it's text. Actual size depends mostly on polygon count and texture resolution.
Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.