# How to convert a 3D model to STL for a slicer

Source: https://0xr.space/m/how/convert-a-3d-model-to-stl-for-a-slicer  
Published 2026-10-20, updated 2026-10-20, by ZeroXR, the maker of Model Explorer (https://0xr.space/).

Open the model at 0xr.space, then on Home open the three-dot menu on its card and press Download STL. Every triangle it draws is written on your device as a binary STL in millimetres with Z up, the way Cura, PrusaSlicer and Bambu Studio read one, so the part lands upright at its size. Downloading needs an account, made with your email address and a 6-digit code.

STL holds one surface and nothing on it: colours, textures, points and lines are left out, and a rigged model is written in its rest pose. Splats, point clouds and models whose licence forbids it cannot be downloaded. An OBJ has no unit and its numbers are written as metres, so an OBJ drawn in millimetres comes out 1,000 times too big; check the size in your slicer.

## Steps

1. Open 0xr.space, press Open and choose the model: a GLB, OBJ, FBX, 3MF, STEP, SketchUp or any other format it reads.
2. On Home, open the three-dot menu on the model's card and press Download STL.
3. If it asks you to sign in, enter your email and the 6-digit code sent to it. The download then goes on by itself.
4. Open the .stl in your slicer. It is named after the model, in millimetres and already Z up.

## Questions

### Is my model uploaded to make the STL?

No. The STL is written in the browser from the copy on your device. Signing in does not send the model anywhere.

### Why do I need an account to download?

Downloading a converted copy needs one, on every device. Opening, viewing and sharing a model do not.

### Why is Download STL greyed out?

The model is a splat or a point cloud, which has no triangles to print, or its licence does not allow downloading.

### Are colours kept?

No. An STL has no colour. Keep the original 3MF for a multicolour print, or press Download GLB for a file that keeps materials and textures.

### Will my slicer read it?

Yes. It is a binary STL with a normal for each triangle, which every slicer reads. Its header gives the model's name and says mm, Z up.

## Related guides

- [How to convert a GLB to USDZ for AR Quick Look](https://0xr.space/m/how/convert-glb-to-usdz-for-ar-quick-look)
- [How to convert an OBJ or FBX to a single GLB file](https://0xr.space/m/how/convert-obj-or-fbx-to-a-single-glb)