Q3Edit — edit, compile, and play Quake 3 maps in your browser

1 min read Original article ↗

Open, edit, and save real .map files — brushes, patches, entities, and terrain in a TypeScript + WebGL2 editor, with BSP compilation by id Software's original q3map compiled to WebAssembly. One click launches your compiled map in browser-native ioquake3.

Launch Q3Edit No game files needed — ships with OpenArena assets. Requires WebGL2.

  • 01 Radiant-style four-view UI
  • 02 Brushes, patches, CSG, terrain
  • 03 q3map + ioquake3 in WASM

Q3Edit showing its four map-editing viewports, toolbars, object list, entity controls, and texture browser

The editor running in a browser tab

Build maps with Codex or Claude.

Connect an AI coding agent to the map open in Q3Edit. The agent can inspect, create, texture, validate, compile, and playtest geometry while every atomic edit appears live in the browser and remains available through normal undo.

MCP setup instructions

  1. 01

    Run the local companion

    Your maps, compiler, assets, and activity logs stay on your computer.

  2. 02

    Connect Q3Edit

    Enter the pairing code in View → Local MCP Connection, or use the printed editor URL.

  3. 03

    Describe the map

    Use Codex, Claude Code, or any compatible MCP client to author and review it.