This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The property RTCSessionDescription.sdp is a read-only DOMString containing the SDP which describes the session.


var value = sessionDescription.sdp;
sessionDescription.sdp = value; 


The value is a DOMString containing an SDP message like this one:

 o=alice 2890844526 2890844526 IN IP4 host.anywhere.com
 c=IN IP4 host.anywhere.com
 t=0 0
 m=audio 49170 RTP/AVP 0
 a=rtpmap:0 PCMU/8000
 m=video 51372 RTP/AVP 31
 a=rtpmap:31 H261/90000
 m=video 53000 RTP/AVP 32
 a=rtpmap:32 MPV/90000


// The remote description has been set previously on pc, an RTCPeerConnection



Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'RTCSessionDescription.sdp' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes15 Yes -moz- No ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes ? ? ? Yes

See also

  • WebRTC
  • The standard for using SDP in an offer/answer protocol RFC 3264.

Document Tags and Contributors

Contributors to this page: fscholz, abbycar, Sheppy, teoli
Last updated by: fscholz,