/Web APIs

SpeechSynthesisVoice: default property

The default read-only property of the SpeechSynthesisVoice interface returns a boolean value indicating whether the voice is the default voice for the current app (true), or not (false.)

Note: For some devices, it might be the default voice for the voice's language. The spec is not very clear on which it should be, so some implementations may differ.


A boolean value.


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";

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


Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
default 33 14 49 No 21 7 No 33 62 No 7 3.0

See also

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