Quake III Arena map editor

Edit, compile & play Quake III maps in your browser.

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

Real screenshot — the editor running in a browser tab

Live MCP authoring

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

01
Run the local companion
Your maps, compiler, assets, and activity logs stay on your computer.
02
Connect Q3Edit
Enter the pairing code in View → Local MCP Connection, or use the printed editor URL.
03
Describe the map
Use Codex, Claude Code, or any compatible MCP client to author and review it.