This report outlines the process, tools, and best practices for converting .glb (Binary glTF) files into the .vrm file format. VRM is a specialized file format for 3D avatars, standardized for use in VR, AR, and the Metaverse (specifically within the Japanese VRM ecosystem). The conversion process is not a simple file rename; it requires specific rigging standards, metadata assignment, and the use of specialized middleware.
The conversion of GLB to VRM is a common requirement for adapting generic 3D models into specialized humanoid avatars used in VTubing and social VR platforms. While both formats are based on the glTF 2.0 standard, VRM adds specific humanoid constraints and metadata that require a deliberate "re-authoring" process. Core Conversion Methods 1. The Professional Workflow (Unity + UniVRM)
This is the industry-standard method for creating feature-complete VRM avatars with physics (spring bones) and complex expressions. Tools Required: Unity Engine and the UniVRM plugin. Process: Import your GLB file into a Unity project. Configure the Rig Type to "Humanoid" and map the bones. convert glb to vrm
Set up materials using VRM-specific shaders like MToon for the anime look.
Configure Spring Bones for hair/clothing physics and BlendShapes for facial expressions. Export using the VRM Exporter menu. 2. The Blender Workflow (Without Unity) This report outlines the process, tools, and best
Ideal for artists who prefer staying within a 3D modeling environment. Convert GLB into VRM | Avaturn | Developer Docs
Pixiv, the creators of VRM, have integrated conversion tools into their VRoid software. While VRoid is designed for anime character creation, it supports importing GLTF/GLB. Pixiv, the creators of VRM, have integrated conversion
This is the professional route. Unity, combined with the VRM Add-on for Unity (maintained by vrm-c/UniVRM), is the official method for creating VRChat or cluster-ready avatars.