Lab · WebRTC · WebSockets · free tool
Two devices. One room.
Enter the same code on a second device, or share the link. Your cursors and a shared object move between the two in a few milliseconds, directly, over WebRTC.
WebRTCNot connected
Drag anywhere to turn the object. Both devices see it.
How it works
A tiny WebSocket server we wrote exchanges the offer, answer and ICE candidates between the two browsers. After that the browsers talk directly over a WebRTC data channel; the server is no longer involved. STUN from the public internet, no TURN relay, so two devices behind strict corporate networks may not connect.
Tell us what you need built.
An engineer reads it and replies within minutes, in your language. Every project starts with a two-week prototype at a flat price.