What you can do
One presenter shares a screen, window or browser tab with one to three viewers. No account or installation is required. Participants can draw, highlight and box areas on the shared view; the presenter controls whether viewers can draw.
Source audio is supported when provided by the browser. The presenter can add microphone commentary, and participants can use temporary room chat.
How connections work
The room service handles invitations, participant state and connection setup. Screen and audio travel directly from the presenter’s browser to each viewer. Drawing marks travel through the presenter’s browser to the viewers. Chat messages pass through the room service.
This version does not record media or use TURN or SFU media relays. Some firewalls and network configurations prevent direct connections. Each additional viewer requires another outgoing stream from the presenter.
What has been checked
Local automated browser tests have exercised real WebRTC connections between separate browser contexts using generated sample video and audio. They cover three viewers receiving media, a fourth viewer being refused, annotations, presenter controls, reconnection, stopping and ending a room.
Phone-sized layouts have been checked in a desktop browser. Real iPhone and Android devices, cross-network connection success and production hosting performance have not yet been verified. Screen-capture permission and real-device microphone behavior still need manual testing.
Capabilities and limits
- Sharing is designed for a supported desktop browser. Phone viewers require a compatible browser.
- Annotations follow the video frame, not the document content. Clear old marks after scrolling or switching content.
- A board keeps up to 100 marks. Each completed stroke syncs after you release the pointer.
- Stopping the screen keeps the room open. Ending the session invalidates the invitation.
- Rooms are temporary and are lost when the room service restarts.
Contact
For support, questions or feedback, email support@screensharing.online. If you need help connecting, include your browser and device, plus the error message you saw. Do not send a private invitation link or access credentials.