In the world of 3D graphics, file formats are often specialized for specific tasks. (the binary version of glTF) has become the universal "JPEG of 3D"—excellent for sharing static or animated scenes, environments, and objects on the web. VRM , on the other hand, is a format built specifically for 3D avatars in VRChat, VTubing, and metaverse applications. It contains humanoid bone structures, blendshapes, and metadata that standard GLB files lack.
(Install Unity, then import UniGLTF and VRM packages via Unity Package Manager or by importing .unitypackage.)
For developers working in Python, the vrm-transform library offers a high-level API for working with both GLB and VRM files. It can be used to load a GLB, manipulate its assets (e.g., resizing textures), and save it as a VRM, providing a flexible solution for Python-based pipelines. convert glb to vrm full
. This adds the necessary export/import functionality that Blender lacks natively. Import your GLB File > Import > glTF 2.0 (.glb/.gltf) and select your model. Prepare the Rig Ensure your model is in a
Select the armature. Navigate to the tab (green stick-figure icon). Look for the VRM User Data panel. In the world of 3D graphics, file formats
Before converting, it is helpful to understand the structural relationship between GLB and VRM.
: Download and install Unity Hub. Use a stable LTS (Long-Term Support) version compatible with the UniVRM version you choose (Unity 2021 LTS or 2022 LTS are highly recommended). If it doesn't
. If it is in an A-pose, rotate the arms up to meet the horizontal axis. The model must have a Humanoid Armature . If it doesn't, you may need to use to auto-rig it first. Assign VRM Data : In the Sidebar (press ), locate the
Unity is the primary ecosystem for VRM. The library is the "standard implementation" of the VRM format. Using this method is excellent because Unity can also handle the "Spring Bone" physics out of the box.
While multiple meshes can work, keeping your model clean and properly named makes assigning bones significantly easier. Method 1: The Quickest Way (Using Web-Based Tools)
There are several methods to convert GLB to VRM: