SPDY/3.1 is the experimental application layer protocol that provides performance improvements over HTTP/1.1 by, for example, connection multiplexing and server push. SPDY/3.1 is superseded by HTTP/2, which was published as an RFC last May.


Specification link

Final published standard: Recommendation, Living Standard, Candidate Recommendation, or similar final form

Status in Chromium


Removed (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No signal
  • No signal
  • No signals


Search tags

spdy, http2,

Last updated on 2020-11-09