Are my 3MF files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting 3MF to GLB free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting 3MF to GLB lose quality?

3MF and GLB describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent. Geometry only. Materials, colours, textures and animation are not carried across, and a model placed several times comes back with each copy baked into its own position.

Do I need to install anything to open GLB files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the GLB afterwards needs whatever software normally handles Binary glTF on your device.

3MFtoGLB

Convert 3MF to GLB

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert 3MF to GLB free and without an account: drop the file above and the GLB is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What 3MF and GLB are for

The modern replacement for STL. Keeps colour, materials and units instead of bare triangles.

glTF with its textures packed in. One file instead of a folder full of dependencies.

How to convert 3MF to GLB

Drop your 3MF file onto this page, or click to pick one.
Choose GLB as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished GLB file.

3MF vs GLB: what changes

3MF compared with GLB
	3MF	GLB
Full name	3D Manufacturing Format	Binary glTF
File extension	.3mf	.glb
Media type	model/3mf	model/gltf-binary

Quality: The result is a close reconstruction rather than an exact copy. Check it before relying on it.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.
What can be lost: Geometry only. Materials, colours, textures and animation are not carried across, and a model placed several times comes back with each copy baked into its own position.

3MF to GLB: common questions

Are my 3MF files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting 3MF to GLB free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting 3MF to GLB lose quality?: 3MF and GLB describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent. Geometry only. Materials, colours, textures and animation are not carried across, and a model placed several times comes back with each copy baked into its own position.
Do I need to install anything to open GLB files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the GLB afterwards needs whatever software normally handles Binary glTF on your device.