CharacterStudio
CharacterStudio is a free, browser-based toolkit for building and optimizing 3D VRM avatars.
What CharacterStudio is
CharacterStudio is a free, browser-based toolkit for building and optimizing 3D VRM avatars. Users can assemble characters with point-and-click controls, preloaded traits and a color picker, bring in their own models and textures, or generate avatars from a manifest.json file. Imported 3D models must be VRM format, with version 0.0 recommended. Replacement textures can be dropped into the browser and work best when their UVs match the base mesh. The studio exports GLB and VRM files and screenshots, and lists programmable animations. Its one-click optimizer merges skinned meshes and atlas textures; the documentation says this can reduce an avatar to a single draw call. Batch export can randomize results or follow metadata schemas. Rendering uses Three.js and WebGL, and the project is open source under the MIT license. JSON-based assembly and export is documented for batch creation of Anata VRMs, but remains a work in progress intended for that use. The makers position the project as an open option for avatar creators and people interested in customizing avatar tools.
Good
- Free web-based avatar creation
- Exports GLB, VRM, and screenshots
- Includes programmable animations
- One-click optimizer merges meshes and textures
- Open source under the MIT license
Watch out
- Imported models must be VRM format
- Texture replacements work best with matching UVs
- JSON assembly is still a work in progress
Who it suits
CharacterStudio suits people creating character avatars for open-world games or exploring how avatar tools can be customized.
Verdict
CharacterStudio combines browser-based avatar building, optimization, and several export options in a free toolkit. Its model-format requirement and unfinished general-purpose JSON workflow are worth considering before choosing it for a project.
The facts
Each one read from CharacterStudio's own pages, with the date it was checked.
What it does
- Animation
- The product lists programmable animations as a feature.checked 7 Oct 2026
- Asset format
- The avatar guide says uploaded 3D model files must be in VRM format and recommends version 0.0.checked 7 Oct 2026
- Batch export
- Batch export can randomize outputs or follow metadata schemas.checked 7 Oct 2026
- Character creation
- Users can select preloaded assets, drag and drop their own 3D models and textures, or generate avatars from a manifest.json file.checked 7 Oct 2026
- Custom assets
- Users can choose preloaded assets or drag and drop their own 3D models and textures.checked 7 Oct 2026
- Customization
- The studio supports point-and-click character building, mixing preloaded traits, and a color picker.checked 7 Oct 2026
- Developer setup
- The quickstart documents cloning the GitHub repository and running the project with npm or Yarn.checked 7 Oct 2026
- Exports
- The studio can export creations as GLB and VRM files, plus screenshots.checked 7 Oct 2026
- Implementation
- The project documentation describes rendering with Three.js and WebGL and says the core logic is in the CharacterManager class.checked 7 Oct 2026
- Import limits
- The avatar guide says imported 3D models must be VRM format and recommends version 0.0; replacement textures work best with UVs matching the base mesh.checked 7 Oct 2026
- Intended users
- The makers describe avatar creation as useful for open-world games and position the project as an open alternative for people who want to study, improve, or customize avatar creation tools.checked 7 Oct 2026
- Open source
- The project describes its codebase as open source under the MIT license.checked 7 Oct 2026
- Optimization
- Its drag-and-drop VRM optimizer can merge textures into an atlas and merge skinned meshes to reduce draw calls and avatar file size.checked 7 Oct 2026
- Programmatic configuration
- Loading a JSON file to assemble and export VRMs is documented as a work in progress and is currently tailored to batch assembling Anata VRMs.checked 7 Oct 2026
- Programmatic setup
- The docs describe JSON-based VRM assembly as tailored to batch assembling Anata VRMs and not yet fully developed for general use.checked 7 Oct 2026
- Purpose
- Character Studio is an open 3D studio for making and optimizing VRM avatars and building customized avatar creator apps with your own assets.checked 7 Oct 2026
- Setup
- The project can be installed by cloning its repository, installing dependencies, and running the development server; the README says default assets are installed separately with npm run get-assets.checked 7 Oct 2026
- Support
- The docs invite artists and developers to join the M3 Discord community for discussion.checked 7 Oct 2026
- Texture editing
- Users can overwrite a trait’s texture by dropping an image into the browser, and the guide recommends matching the base mesh UV.checked 7 Oct 2026
- Web rendering
- The about page describes rendering with Three.js and WebGL.checked 7 Oct 2026
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