Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using your own device’s processing power. The file never leaves your computer or phone, which is why it also works when your connection drops.

Can I print it straight away?

You can slice it straight away. Whether it prints well depends on the model — wall thickness, overhangs and whether the mesh is watertight are properties of the model, not of the conversion.

What happens to the colours?

They are not in the STL, because STL cannot store colour. Every STL is like this, from every program.

Convert GLB to STL

Runs on your device · Your file never leaves your device.

You have a GLB — downloaded, exported from a web tool, or handed to you — and you want to print it. STL is what the slicer wants. This takes the shape out of the GLB and writes it as a binary STL.

Everything that is not shape stays behind, because STL has no room for it: colours, textures and any animation. What you get is the geometry, in the format every printer understands. If the GLB held several separate objects they are written into the one STL together, exactly as they sat relative to each other.

The conversion runs on your own machine, which for a 3D file is the whole point: a model is usually a client’s product, a scanned property or something not yet announced. Nothing is sent to a server, so there is nothing to delete afterwards and nothing to take anyone’s word for.

How to convert GLB to STL

Drop the GLB file — and its companion files if it has any.
Check that STL is selected.
Press Convert.
Download the STL file.

Supported formats and limits

Input: GLB
Output: STL
Companion files: MTL and texture images are used when you add them
Keeps animation: No — the format cannot store it
Where it runs: In your browser; the model is never uploaded

Not for: Mending a mesh for printing — holes, flipped faces and non-manifold edges come through as they were.

Frequently asked questions

Are my files uploaded to a server?: No. This conversion runs entirely inside your browser using your own device’s processing power. The file never leaves your computer or phone, which is why it also works when your connection drops.
Can I print it straight away?: You can slice it straight away. Whether it prints well depends on the model — wall thickness, overhangs and whether the mesh is watertight are properties of the model, not of the conversion.
What happens to the colours?: They are not in the STL, because STL cannot store colour. Every STL is like this, from every program.

More you can do with a GLB file

Other ways to get a STL

3MF to STL

Related tools

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