Which (VSeeFace, VRChat, etc.) are you planning to use? Are you using VRM 0.0 or VRM 1.0 specifications?
The most stable, reliable way to convert a GLB to a VRM is using the paired with the official UniVRM plugin . This method gives you complete control over bone mapping and expressions. 1. Set Up Your Environment convert glb to vrm fixed
If you need a one-click solution and don't need custom physics, these browser-based tools are reliable: GLTF/GLB character imports puts skeleton not at root Which (VSeeFace, VRChat, etc
If your GLB is already perfectly rigged and you just need a format swap: This method gives you complete control over bone
High learning curve; requires manual "bone mapping" to ensure the VRM standard is met. 🌠Open Source Option: JustinBenito gltf2vrm
VRM requires a strict T-pose. If your GLB is in an A-pose, you must re-pose and "Apply as Rest Pose" in Blender before exporting. Fast Online Converters