Free GLTF to GLB converter

Why convert GLTF to GLB?

People convert GLTF to GLB because a glTF scene is split across a JSON file and its buffers, so pieces go missing whenever it is moved, while a GLB is one self-contained file, which is exactly what AR viewers and the web want.

How to convert GLTF to GLB

1. Choose your GLTF file. Drop it on the box above, or tap to browse. You can pick several files at once.
2. Confirm the target is .glb. It is preselected when your browser can encode it; otherwise the closest available target is chosen. Adjust quality, size or the other options if you want to.
3. Convert and download. Press Convert, then Download. Your file stays on your device the whole time.

What is a .gltf file?

glTF is a JSON description of a 3D scene — meshes, materials, nodes, animations — with the vertex data either alongside or embedded. It is often called “the JPEG of 3D”, and GLB is simply the same thing packed into one binary file.

What is a .glb file?

GLB is the single-file binary form of glTF, and the format the augmented-reality world has standardised on — Android's Scene Viewer, web viewers, Unity and three.js all take one directly. Geometry, materials and animation travel in one file that loads fast.

What to expect from this conversion

Geometry is converted exactly, with node transforms applied so the model keeps its pose. Materials, textures and animation are not carried across. Check the scale in your viewer: STL files carry no units, so a model exported in millimetres can appear a thousand times too large.

Is it private?

Yes, by design. Every conversion happens inside your own browser using your device’s processor — there is no server that receives your GLTF file, so there is nothing for anyone to store, scan or leak. You can confirm it yourself: open your browser’s developer tools, watch the Network tab while you convert, and you will see no upload.

Questions about GLTF to GLB

Is this GLTF to GLB converter free?

Yes, completely. There is no account, no daily limit, no watermark and no premium tier.

Is my GLTF file uploaded to a server?

No. The conversion runs inside your own browser using your device's processor. The file is read from your disk, converted in memory and saved back to your disk — nothing is transmitted, so there is nothing for anyone to store.

Can I convert GLTF to GLB online without downloading software?

Yes. This is an online GLTF to GLB converter that runs in your browser, so there is nothing to install and no app to trust with your files. It works the same on a phone.

What happens to the quality?

Geometry is converted exactly, with node transforms applied so the model keeps its pose. Materials, textures and animation are not carried across. Check the scale in your viewer: STL files carry no units, so a model exported in millimetres can appear a thousand times too large.

Can I convert several GLTF files at once?

Yes. Select as many files as you like and they are converted one after another in a single tap, with a download for each and a zip of all of them.

Can I convert GLTF to GLB without Blender or a script?

Yes — that is what this page is for. Blender does the same job well if you already have it set up and thousands of files to process; for one file, or a handful, the browser is faster than installing anything.

Should I keep the original GLTF file?

Yes — keep it, converting never touches it. The reason to make a copy in another format is that a glTF scene is split across a JSON file and its buffers, so pieces go missing whenever it is moved.

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