WebRTC COTURN Tester

Screen sharing • ICE relay diagnostics • Manual signaling

Person A Sender

Shares their screen. Creates and sends the Offer.

1
Open this page on your PC
2
Fill in COTURN server config below
3
Click Start Screen Share → then Create Offer
4
Copy the Offer SDP and send it to Person B (paste, email, chat, etc.)
5
Receive the Answer SDP back from Person B, paste it and click Set Answer
6
Wait for Connected status — your screen should appear on their end
Person B Receiver

Views the shared screen. Creates and sends the Answer.

1
Open this page on your PC
2
Fill in the same COTURN server config
3
Receive the Offer SDP from Person A, paste it into the Offer box
4
Click Set Offer & Create Answer
5
Copy the Answer SDP and send it back to Person A
6
Wait for Connected — the screen stream will appear in the video below
COTURN / ICE Server Config

Example URL: turn:1.2.3.4:3478 or turns:my.server.com:5349

Connection
Not started
Remote Screen (incoming)
Waiting for stream…
SDP Signaling (copy & paste manually)
ICE Candidate Diagnostics

relay candidates confirm your COTURN server is working. If you only see host candidates, COTURN is not reachable.

0Host
0Server Reflexive
0Relay (TURN ✓)
Type Protocol Address Port Related
No candidates yet
Event Log