q3.pieter.com

q3.pieter.com is a browser version of Quake III Arena multiplayer, run by Pieter Levels as a non-commercial, unofficial preservation project. It uses Q3JS, Luka Klacar's build of the ioquake3 engine compiled to WebAssembly. You type a player name and land in a match on the site's live server; the start page shows who is online, the current and next map, kill rankings and a countdown to a daily match.

How to play

1. Enter a player name and press Play. The game downloads its assets with a progress bar; they are cached after the first load.
2. F11 toggles fullscreen. If sound is muted, click the page once.
3. On touch screens, the left stick moves, you drag anywhere to look, and the shoot and jump buttons sit at the bottom right. Scores and chat buttons sit at the top left. Upright and sideways both work.
4. With a gamepad, the left stick moves and the right stick looks. The right trigger fires, A or the left trigger jumps, B crouches, the bumpers switch weapons, Y shows scores and Start opens the menu.
5. The daily match starts at 8 PM GMT. The start page can send browser notifications for it, and for when enough human players are online.

What you need

• A browser with WebAssembly and IndexedDB. The engine uses an OpenGL 2 renderer.
• A keyboard and mouse, a touch screen, or a gamepad.
• Files: none.

Good to know

• Q3JS says it uses the officially released demo data, and the site describes itself as an unofficial fan project, not affiliated with id Software.
• The Q3JS repository is public, but only its ioquake3-based engine is GPL-licensed; the rest of the code is marked proprietary.
• Pieter Levels announced the server on March 16, 2026, seven years after he set up an earlier Quake III server.
• Quake III Arena was made by id Software and released for Windows on December 2, 1999.