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 GLTF 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 GLTF lose quality?

3MF and GLTF 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 GLTF files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the GLTF afterwards needs whatever software normally handles GL Transmission Format on your device.

3MFtoGLTF

Convert 3MF to GLTF

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

You can convert 3MF to GLTF free and without an account: drop the file above and the GLTF 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 GLTF are for

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

The 3D format for the web. Geometry, materials and animation in one JSON file.

How to convert 3MF to GLTF

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

3MF vs GLTF: what changes

3MF compared with GLTF
	3MF	GLTF
Full name	3D Manufacturing Format	GL Transmission Format
File extension	.3mf	.gltf
Media type	model/3mf	model/gltf+json

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 GLTF: 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 GLTF 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 GLTF lose quality?: 3MF and GLTF 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 GLTF files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the GLTF afterwards needs whatever software normally handles GL Transmission Format on your device.