Turn text into editable Three.js. Export as GLB.
A local, open-source workbench for generating 3D assets with an OpenAI or Anthropic model, or the opt-in experimental Codex connection. The result is JavaScript you can inspect and edit—not just a mesh. Ask for editable controls, adjust the asset locally, and export it to Blender or your own Three.js project.
A two-minute walkthrough of the generator and both included demos. 4K, no audio.
ThreeJS-Generator-Demo-4K.mp4
| Park Apartments | Woodland Mushrooms | Alpine Cottage |
|---|---|---|
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These editable examples ship with the app. No API key is needed to try them.
Install Node.js 24 and use a current desktop Chrome or Edge browser. Download/extract the source or clone this repository, then open a terminal in the folder containing package.json:
npm ci
npm run devOpen http://127.0.0.1:5173 and keep the terminal running. If that port is occupied, use the different URL Vite prints; each origin has separate Library/recovery storage.
- Choose Try an example, or Browse templates, and load a generated starter.
- Drag to orbit, scroll to zoom, and adjust its controls. These actions are local and free.
- Choose Save to Library to keep a named copy, or Download GLB to take it into Blender.
To generate your own asset, choose a connection:
| Connection | Setup | Usage |
|---|---|---|
| OpenAI or Anthropic API | Open Model settings, select a provider/model, enter its API key and save. | Billed directly by that API provider; ChatGPT/Claude subscriptions do not include API usage. |
| Codex (experimental) | Follow the Codex setup guide to enable a supported local runtime, then sign in with ChatGPT through Model settings. | Uses available Codex allowance, not a separate API key. Account limits and model access apply. |
Then describe your asset and select Generate. Connection/configuration indicators are not paid generation tests or guarantees of model access. No .env is required for browser-entered API session keys; optional persistent configuration is explained in the user guide.
Codex mode keeps the same UI, including AI Edit, animation requests, editable controls, Library and exports. It is disabled by default, currently live-tested on Windows with two exact CLI versions, and rejects unaudited versions rather than falling back to API billing. Cloned this into Codex Desktop? Start with the copyable setup request and terminal steps.
- Generate custom
createAsset()code, inspect it, or apply an AI Edit. - Add editable controls, optionally describing what should be adjustable—floor count, roof pitch, foliage density, colors, and more. Subsequent slider edits need no AI request.
- Save assets with their seed, parameters and textures. Local recovery protects the last working asset and unapplied code draft; Library JSON backups move saved assets between computers.
- Download an editable
.jspreset or a static.glbscene. Copy source deliberately copies only the function, not its saved inputs. - Arrange repeated assets, compare an automatically optimized layout, and download that layout as GLB. Optimization makes no API call and does not simplify geometry.
The app preserves the last working asset when a generation or edit fails. Generated code is executed in an isolated browser worker; geometry hints are advisory, not extra AI rejection rounds.
Snack Abduction turns seven exported JavaScript assets into a playable tabletop UFO game. It imports the generated source directly: the saucer's emitter glows, the robot's brushes spin, and generated snacks become things you can pick up and score with. No GLBs or API key are needed to play.
From the repository root:
npm --prefix demos/snack-abduction ci
npm run demo:snack-abductionOpen http://127.0.0.1:5174.
Little Borough is a relaxed city planner made from six exported JavaScript assets. Click to add apartment floors, right-click to remove them, and build a colorful neighborhood around a park. Floor changes regenerate real geometry; cars, vans and trees show off the exports' procedural variations.
npm --prefix demos/little-borough ci
npm run demo:little-boroughOpen http://127.0.0.1:5175. Both demos have their own dependencies and builds, so they can run alongside the generator. Neither needs an API key. See demos for the source and checks.
- User guide: keys, costs, controls, saving/recovery, imports, exports, batching and troubleshooting.
- Codex setup: optional subscription-backed connection, Windows startup, supported runtimes and update troubleshooting.
- Development: commands, tests, contribution conventions and local API integration.
- Architecture and runtime safety.
- Changelog and release checklist.
To run a production build locally:
npm run build
npm startOpen http://127.0.0.1:4173. A static file host alone is not enough; the local Node server provides the model API. Browser storage is tied to the origin, so development and production ports have separate libraries and recovery copies.
This is a local desktop-browser tool, not a multi-user hosted service. AI geometry can contain intersections, missing details, or inefficient construction; inspect results before use. Runtime JavaScript animation exports as a static GLB snapshot. Optimized GLB uses instancing, whose handling varies between importers. Isolation reduces access to the app and network but cannot guarantee protection from excessive GPU/memory use or browser bugs. Only import code you trust.
There is no local-model inference backend. Model IDs are configurable; available models and API prices depend on your provider account. The built-in examples work without provider access.
MIT, copyright © 2026 Gary Smith. Third-party components retain their own licenses; see third-party notices. Built copies also include generated dependency licenses and supplemental notices.