| Problem | Fix | |--------|-----| | No humanoid bones | Use Mixamo auto-rig, then export as FBX → GLB | | VRM export missing face expressions | Add blend shapes in Blender/Unity | | Texture missing | Re-link images in Blender’s Shader Editor | | Rotation wrong | Apply rotation/scale before export |
A GLB file might contain a beautiful 3D model, but VRM requires specific "hooks":
A raw GLB rarely has these. Therefore, "conversion" is actually a rigging and setup process.
For complete VRM export with animations and blend shapes, consider using UniVRM in Unity or VRoid Studio. convert glb to vrm full
Converting a GLB file to VRM requires more than a simple file format change; it involves adding humanoid avatar data (metadata, bone mapping, and physics) to a standard 3D model Method 1: Using Blender (Recommended for Customization)
This is the most flexible method and does not require Unity. Install the Plugin : Download and install the VRM Add-on for Blender Import GLB : Use the standard File > Import > glTF 2.0 (.glb/.gltf) Map Humanoid Bones Ensure your model is in a
In the VRM sidebar, map your model’s bones to the corresponding VRM humanoid slots (head, spine, arms, etc.). Add Expressions & Physics : Use Blender's Shape Keys to define facial expressions (A, E, I, O, U) and Spring Bones for hair or clothing movement. File > Export > VRM (.vrm) and fill out the metadata (Author, License) before saving. Method 2: Using Unity (The Industry Standard) | Problem | Fix | |--------|-----| | No
This method is preferred for professional VTubing setups as it uses the official UniVRM tools. バーチャルマーケット Set Up Unity : Install a compatible Unity version and the UniVRM package Import Assets : Drag your file into the Unity project window. Humanoid Configuration : Select the model, set its Animation Type in the Inspector, and click "Apply". First Export (Normalization) VRM > Export to VRM . This "normalizes" the model’s rotation and scale. Refine & Final Export : Re-import the exported VRM to set up Spring Bones BlendShapes for expressions, and the First Person view. Export one last time to finish. Method 3: Quick Online Converters
For a fast, automated conversion without manual rigging, these tools can work if your GLB is already properly rigged: gltf2vrm (GitHub Tool)
: A web-based tool where you can upload a GLB, map bones in the browser, and download the VRM. A GLB file might contain a beautiful 3D
: Often used for converting avatars generated in their system directly to VRM. setting up Spring Bones for hair physics, or are you looking for troubleshooting help with texture errors during conversion? Convert ANY 3D model to VRM! (without Unity)
This is the industry standard used by VRChat avatar creators. Unity (free) with the UniVRM package is the only tool that reliably converts GLB to fully functional VRM with expressions and physics.