MeshFormat

GLB to 3MF Converter

Drop a .glb file below and get a .3mf back. The conversion happens inside this page using WebAssembly, so nothing is uploaded to a server and there is no queue to wait in.

  • Private by designFiles stay on your device.
  • No queueConversion starts instantly.
  • No sign upNo account, no limits per day.

Compatibility

What survives the trip from GLB to 3MF.

FeatureGLB3MFResult
GeometrySupportedSupportedSupported
Vertex colorsSupportedSupportedSupported
MaterialsSupportedPartialPartial
TexturesSupportedNot supportedNot supported
Scene hierarchySupportedSupportedSupported
AnimationSupportedNot supportedNot supported

How to convert GLB to 3MF

  1. 1Add your GLB fileDrop the .glb file into the box, or pick it from disk. Multiple files are converted one after another.
  2. 2Pick 3MF as the output3MF is already selected on this page. Adjust scale, up axis or triangle budget if the target application is picky.
  3. 3Download the resultThe .3mf file is written locally and appears as a download button next to your file.

About GLB

GLB packs an entire glTF 2.0 scene, including textures and animation clips, into one binary file. It is the format of choice for the web, AR and real time engines because it loads fast and needs no external assets.

  • three.js
  • Babylon.js
  • Unity
  • Unreal Engine
  • Blender

About 3MF

3MF is a zipped XML package that fixes what STL never had: real units, colours, materials, multiple objects and print metadata. Every current slicer reads it and it is the default in Bambu Studio and PrusaSlicer.

  • PrusaSlicer
  • Bambu Studio
  • Cura
  • Windows 3D Builder
  • Fusion 360

Questions

Is this GLB to 3MF converter free?

Yes. There is no account, no daily quota and no watermark. The tool is a static web page and the work is done by your own CPU, so there are no server costs to pass on.

Are my files uploaded anywhere?

No. MeshFormat loads a WebAssembly build of the geometry kernels into your browser and reads the file locally. You can open the network tab and confirm that nothing leaves the page, or disconnect after the page has loaded and keep converting.

How large can a GLB file be?

The practical limit is your available memory rather than an arbitrary cap. Models up to a few hundred megabytes work on a normal laptop; very dense scans convert faster if you lower the triangle budget in the options.

What is lost when converting GLB to 3MF?

Textures: texture images are dropped, so uv mapped detail will not travel with the file. Animation: animation tracks are dropped, because the output format stores static geometry only.

Which programs open 3MF files?

PrusaSlicer, Bambu Studio, Cura, Windows 3D Builder and most other tools that work with 3D meshes read .3mf directly.

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