Convert RBXM to USDZ
Free, in your browser, with nothing uploaded. Drop your .rbxm file in and take the .usdz away.
Drop your RBXM file here
.rbxm in, .usdz out
Choose filesNothing is uploaded No account, no email No file size limit
How to convert RBXM to USDZ
- 01
Add your .rbxm file
Drag your Roblox Model file onto the drop zone, or click it to browse. Nothing is uploaded: it is read where it already sits.
- 02
Check the preview
The model is parsed on your machine and drawn in the viewport, so a wrong axis or a missing texture shows up before you commit rather than downstream.
- 03
Save the .usdz file
Press convert. The Universal Scene Description (zipped) file is written in the tab and lands in your downloads folder. No link, no expiry, no account.
What carries over, and what does not
A format conversion is a translation, and translations lose things. Here is what actually happens when an RBXM file becomes a USDZ file.
| Data | RBXM | USDZ | Survives |
|---|---|---|---|
| Geometry | Yes | Yes | Yes |
| Materials & colour | Yes | Yes | Yes |
| Texture maps | No | Yes | n/a |
| Animation & rigs | No | Yes | n/a |
| Scene hierarchy | Yes | Yes | Yes |
This is a comparatively lossless pairing: 3 of the five categories above are supported by both formats, so most of what is in your RBXM file has somewhere to go in the USDZ file.
About Roblox Model
An .rbxm holds a Roblox instance tree in a chunked binary container, with each property stored as one column across every instance of a class rather than object by object, and the payloads packed with LZ4 or Zstandard. Roblox builds are assembled from boxes, spheres, cylinders and wedges with a size, a position and a colour, and all of that reconstructs exactly, hierarchy included. What cannot is a MeshPart or a CSG union: those store an asset id pointing at Roblox’s own servers rather than any geometry, so they come through as empty nodes and are reported.
Commonly seen in: Roblox Studio, Rojo, Roblox asset pipelines. More on the RBXM format page.
About Universal Scene Description (zipped)
USDZ is Pixar’s Universal Scene Description packed into an uncompressed zip archive, and it is the format Apple’s AR Quick Look expects. Send someone a .usdz link and iOS will drop the model into their living room straight from Safari or Messages, with no app to install. Under the hood USD is a full scene-composition system built for feature-film pipelines, of which USDZ exposes a deliberately narrow, single-asset slice.
Commonly seen in: AR Quick Look on iOS, Reality Composer, Safari, Shopify AR, Adobe Aero. More on the USDZ format page.
How the conversion works
When you drop a file in, the bytes are handed to a parser compiled to run in your browser. The RBXM data is decoded into an in-memory scene graph of meshes, materials and transforms, which is what the preview is drawing. Pressing convert walks that scene graph back out through a USDZ writer and hands you the resulting bytes as a download.
The whole round trip is local. The page itself is static: it is delivered once and then does its work offline. That is why the privacy claim is checkable rather than a promise.
RBXM to USDZ: common questions
Is my RBXM file uploaded anywhere?
No. The file is read by code running inside this browser tab and never crosses the network. You can prove it by disconnecting from the internet before you convert, the page keeps working, or by watching the Network tab in your browser's developer tools while you drop a file in.
How large an RBXM file can I convert?
There is no server-side limit because there is no server. The practical ceiling is your own machine's memory: a browser tab can usually handle models up to a few hundred megabytes. Very dense scans or scenes with millions of triangles will take a few seconds and a lot of RAM.
Why does my converted USDZ file look untextured?
USDZ does support textures, but the images have to be available to embed. If your RBXM file references texture images that live next to it on disk, drag those images into the drop zone along with the model and they will be picked up.
Does it cost anything?
No. There is no fee, no account, no watermark and no per-file limit. Since the conversion runs on your hardware rather than ours, serving this page costs about as much as serving a blog post.
Does it work on a Mac, on Windows or on a phone?
All of them. There is nothing to install: any browser with WebGL 2 will do, which covers current Chrome, Edge, Firefox and Safari on desktop, and Safari and Chrome on mobile. A phone has less memory than a laptop, so a very heavy scene may be the one thing it cannot finish.
Related conversions
Other things to do with the same file.
From RBXM:
Other ways to get to USDZ:
Or do something else with it: