Speech synthesisBaseline · Widely available

The SpeechSynthesis API converts text to speech with artificial voices.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 5, 2018. Widely available since Mar 5, 2021.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–32Not supported

33+Supportedsince Feb 20, 2014

Current: 155

Edge

12–13Not supported

14+Supportedsince Aug 2, 2016

Current: 154

Firefox

1–48Not supported

49+Supportedsince Sep 20, 2016

Current: 157

Safari

1–6Not supported

7+Supportedsince Oct 22, 2013

Current: 27

MobileChrome Android

18–32Not supported

33+Supportedsince Feb 26, 2014

Current: 155

Firefox Android

4–61Not supported

62+Supportedsince Sep 5, 2018

Current: 157

Safari iOS

1–6Not supported

7+Supportedsince Sep 18, 2013

Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: SpeechSynthesis.

Feature detection

JS · check before using

if ("SpeechSynthesis" in globalThis) {
  // SpeechSynthesis is available
} else {
  // load a polyfill or use a fallback
}

Documentation (MDN)

Specification

webaudio.github.io#tts-section ↗

Usage share

caniuse.com/speech-synthesis ↗

Sub-features

Support for each part of the feature (42). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
SpeechSynthesis	33	14	49	7	33	62	7
SpeechSynthesis.cancel	33	14	49	7	33	62	7
SpeechSynthesis.getVoices	33	14	49	7	33	62	7
SpeechSynthesis.pause	33	14	49	7	33	62	7
SpeechSynthesis.paused	33	14	49	7	33	62	7
SpeechSynthesis.pending	33	14	49	7	33	62	7
SpeechSynthesis.resume	33	14	49	7	33	62	7
SpeechSynthesis.speak	33	14	49	7	33	62	7
SpeechSynthesis.speaking	33	14	49	7	33	62	7
SpeechSynthesis.voiceschanged_event	33	14	49	16	33	62	16
SpeechSynthesisErrorEvent	33	≤18	49	7	33	62	7
SpeechSynthesisErrorEvent.SpeechSynthesisErrorEvent	71	79	49	16	71	62	16
SpeechSynthesisErrorEvent.error	33	≤18	49	7	33	62	7
SpeechSynthesisEvent	33	14	49	7	33	62	7
SpeechSynthesisEvent.SpeechSynthesisEvent	71	14	49	16	71	62	16
SpeechSynthesisEvent.charIndex	33	14	49	7	33	62	7
SpeechSynthesisEvent.charLength	77	15	53	16	77	62	16
SpeechSynthesisEvent.elapsedTime	33	14	49	7	33	62	7
SpeechSynthesisEvent.name	33	14	49	7	33	62	7
SpeechSynthesisEvent.utterance	33	14	49	16	33	62	16

Show 22 more

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
SpeechSynthesisUtterance	33	14	49	7	33	62	7
SpeechSynthesisUtterance.SpeechSynthesisUtterance	33	14	49	7	33	62	7
SpeechSynthesisUtterance.boundary_event	✕	14	49	7	✕	62	7
SpeechSynthesisUtterance.end_event	33	14	49	7	33	62	7
SpeechSynthesisUtterance.error_event	33	14	49	7	33	62	7
SpeechSynthesisUtterance.lang	33	14	49	7	33	62	7
SpeechSynthesisUtterance.mark_event	33	14	49	7	33	62	7
SpeechSynthesisUtterance.pause_event	33	14	49	7	33	62	7
SpeechSynthesisUtterance.pitch	33	14	49	7	33	62	7
SpeechSynthesisUtterance.rate	33	14	49	7	33	62	7
SpeechSynthesisUtterance.resume_event	33	14	49	7	33	62	7
SpeechSynthesisUtterance.start_event	33	14	49	7	33	62	7
SpeechSynthesisUtterance.text	33	14	49	7	33	62	7
SpeechSynthesisUtterance.voice	33	14	49	7	33	62	7
SpeechSynthesisUtterance.volume	33	14	49	7	33	62	7
SpeechSynthesisVoice	33	14	49	7	33	62	7
SpeechSynthesisVoice.default	33	14	49	7	33	62	7
SpeechSynthesisVoice.lang	33	14	49	7	33	62	7
SpeechSynthesisVoice.localService	33	14	49	7	33	62	7
SpeechSynthesisVoice.name	33	14	49	7	33	62	7
SpeechSynthesisVoice.voiceURI	33	14	49	7	33	62	7
Window.speechSynthesis	33	14	49	7	33	62	7