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.

Will the GLB have colours?

No, because the STL had none. STL stores triangles only. The GLB arrives with a single neutral material, which you can replace in any 3D program.

Can I show it in AR on an iPhone?

Convert it to USDZ for that — Apple’s Quick Look wants USDZ specifically. GLB is the right choice for the web and for AR on Android.

Convert STL to GLB

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

STL is the printing format: shape and nothing else, and almost nothing on the web will display it. GLB is the web format: one self-contained file that a browser, a model viewer or an AR view can open directly. This converts the printable file into the showable one.

Since the STL carried no colour, the GLB arrives with one plain surface — there was nothing else to bring. What you gain is a file you can put on a page, send to a client, or drop into a viewer without them needing any 3D software at all.

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 STL to GLB

Drop the STL file.
Check that GLB is selected.
Press Convert.
Download the GLB file.

Supported formats and limits

Input: STL (binary or ASCII)
Output: GLB
Colour: None — an STL has no colour to carry
Keeps animation: Nothing to keep; STL has no animation
Where it runs: In your browser; the model is never uploaded

Not for: Adding colour or texture the STL never had — no converter can recover what the source format cannot store.

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.
Will the GLB have colours?: No, because the STL had none. STL stores triangles only. The GLB arrives with a single neutral material, which you can replace in any 3D program.
Can I show it in AR on an iPhone?: Convert it to USDZ for that — Apple’s Quick Look wants USDZ specifically. GLB is the right choice for the web and for AR on Android.

Other ways to get a GLB

Related tools

This page in other languages: العربية · Deutsch · Français · Español · Русский · Português · 中文 · हिन्दी · Türkçe · עברית · فارسی · اردو · Bahasa Indonesia · বাংলা