Official documentation
SpeechRecognition: processLocally property
MDN Web Docs (Mozilla), 2026
Read the originalRead on October 17, 2026
- What it is
- MDN's reference page for the processLocally property, which tells a web page whether speech recognition must run on the device.
- How much weight it carries
- Maintained by Mozilla and reviewed against the Web Speech API specification. The page is marked experimental, so the behavior may change.
Facts taken from this source
- MDN marks the processLocally property as experimental and tells developers to check the browser compatibility table before using it in production.
“Experimental: This is an experimental technology Check the Browser compatibility table carefully before using this in production.” (Page header)
- By default, a browser may choose whether speech recognition runs on the device or on a remote service, because processLocally is false unless a page sets it to true.
“If set to false (the default), the user agent can choose whether to do the processing locally or remotely.” (Value section)