The relay is waking up
Roblox,
in a browser.
The official client runs on a PC you own. Weblox carries its screen and input through Cloudflare, so this tab is all you need. Real engine, real RakNet, nothing to install.
- Transport
- RakNet over UDP
- Relay
- Cloudflare edge
- Room limit
- 50 seats
Enter the room
Six characters
stand between you
and the game.
The host window prints a code when it starts. Type it here, pick a name, and the relay will pair you with the PC that is already playing.
- 01
No account here. The Roblox session never leaves the host PC.
- 02
No download. Frames arrive over a WebSocket; input goes back the same way.
- 03
One player at a time. Everyone can watch, and control passes in a queue.
The shape of a session
Three pieces,
in order.
Weblox is deliberately small. It does not emulate Roblox. It gives the official web client the two things this browser cannot: a real UDP socket, and an authenticated session.
-
01
The PC opens the door
host · Windows x64startrblx.batlaunches the packaged Electron client, signs in through a real Roblox window, joins the experience, and binds one UDP socket to the edge. -
02
Cloudflare carries it
The host dials the relay outbound. A Durable Object holds the room, fans JPEG frames out to every viewer, and forwards the controller's input back to the PC.
relay · Workers + DO -
03
The browser steps in
This page renders the stream, measures the link, and sends pointer and keyboard events. Nothing is installed and no Roblox cookie reaches the browser.
viewer · any modern browser
WebClient.wasm, patched only at the socket seamRight now
The link,
measured.
These numbers come from the live relay, not a marketing page. If the relay is down, they say so.