Loom Docs
loomgui.com ↗

What is Loom

Loom lets you build Unity game UI with HTML, CSS, and JavaScript instead of UI Toolkit’s USS dialect or uGUI’s prefab graph. Your UI is a normal Vite + Solid app, and your C# code drives it through a typed bridge generated from a plain C# class.

What you get

  • A Unity package (onl.snack.loom) with the C# runtime, source generator, platform plugin, and Editor menus that handle setup.
  • Bundled UI packages (@loomgui/bridge and @loomgui/vite-plugin) that are installed into your UI app with Loom -> Sync UI Dependencies.
  • A typed bridge between C# and the UI. C# exposes state, actions, and events; the UI consumes generated TypeScript types.
  • A sample project that shows startup, screen routing, state updates, actions, events, mock mode, and player builds.

Who it’s for

Loom fits Unity teams that want web-quality UI iteration, layout, typography, and animation inside their game. It works especially well when:

  • Your UI team is already comfortable with HTML, CSS, and TypeScript.
  • You want hot reload and browser devtools while the game is running.
  • You need complex menus, HUDs, overlays, data views, or live-ops surfaces.
  • You want a clean contract between gameplay code and UI code.

What Loom is not

  • A replacement for Unity rendering, scene UI, or world-space interaction.
  • A general embedded browser API for arbitrary public websites.
  • A no-code UI builder.

Next steps

  1. Check Supported platforms.
  2. Read How Loom fits if you want the project shape before installing.
  3. Follow Install Loom or Run the sample.