SpeechSynthesisVoice: localService property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2018.

The localService read-only property of the SpeechSynthesisVoice interface returns a boolean value indicating whether the voice is supplied by a local speech synthesizer service (true), or a remote speech synthesizer service (false.)

This property is provided to allow differentiation in the case that some voice options are provided by a remote service; it is possible that remote voices might have extra latency, bandwidth or cost associated with them, so such distinction may be useful.

Value

A boolean value.

Examples

js
for (let i = 0; i < voices.length; i++) {
  const option = document.createElement("option");
  option.textContent = `${voices[i].name} (${voices[i].lang})`;

  if (voices[i].default) {
    option.textContent += " — DEFAULT";
  }

  console.log(voices[i].localService);

  option.setAttribute("data-lang", voices[i].lang);
  option.setAttribute("data-name", voices[i].name);
  voiceSelect.appendChild(option);
}

Specifications

Specification
Web Speech API
# dom-speechsynthesisvoice-localservice

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
localService

Legend

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Full support
Full support
No support
No support

See also