As of 2025, VRM 1.0 is the new standard. It supports and expression constraints that GLB does not.
There are several methods for converting GLB to VRM, each with its pros and cons: convert glb to vrm high quality
Avoid online converters. They strip blendshapes (morph targets for eye blinking, mouth movements) and corrupt tangent space normals. As of 2025, VRM 1
: Your model must be in a standard T-Pose during export, or the movements will look distorted. As of 2025
Low-quality conversions share three fatal flaws: