Fetch upload streaming lets web developers make a fetch with a ReadableStream body. Fetch provides a generic definition of Request and Response objects (and other things involved with network requests).


Traditionally uploading byte arrays were implemented on WebSocket but it has made client/server code messy. Fetch upload streaming makes that simpler.



Specification link

Unknown standards status - check spec link for status

Status in Chromium


Origin trial (tracking bug)

Consensus & Standardization

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

  • Positive
  • Positive
  • Positive



A web developer gRPC already agrees to participate this experiment: https://github.com/whatwg/fetch/issues/966#issuecomment-608128154. Some Japanese web authors wrote a introduction of this feature [1] and got +1000 interests. [1] https://t.co/vh9tCIrj6o?amp=1

Last updated on 2021-12-13