4 Best Text-to-Speech Libraries for Node.js

Following are the best TTS libraries for Node.js:

say.js

say is a TTS library for node.js. It can send text from node.js to your speakers.

// automatically pick platform
const say = require('say')

// or, override the platform
const Say = require('say').Say
const say = new Say('darwin' || 'win32' || 'linux')

// Use default system voice and speed
say.speak('Hello!')

// Stop the text currently being spoken
say.stop()

// More complex example (with an OS X voice) and slow speed
say.speak("What's up, dog?", 'Alex', 0.5)

// Fire a callback once the text has completed being spoken
say.speak("What's up, dog?", 'Good News', 1.0, (err) => {
  if (err) {
    return console.error(err)
  }
  console.log('Text has been spoken.')
});

// Export spoken audio to a WAV file
say.export("I'm sorry, Dave.", 'Cellos', 0.75, 'hal.wav', (err) => {
  if (err) {
    return console.error(err)
  }

  console.log('Text has been saved to hal.wav.')
})

say.js has great documentation and is easy to use.

nodejs-text-to-speech

This is cloud Text-to-Speech API client for Node.js.

// Imports the Google Cloud client library
const textToSpeech = require('@google-cloud/text-to-speech');

// Import other required libraries
const fs = require('fs');
const util = require('util');
// Creates a client
const client = new textToSpeech.TextToSpeechClient();
async function quickStart() {
  // The text to synthesize
  const text = 'hello, world!';

  // Construct the request
  const request = {
    input: {text: text},
    // Select the language and SSML voice gender (optional)
    voice: {languageCode: 'en-US', ssmlGender: 'NEUTRAL'},
    // select the type of audio encoding
    audioConfig: {audioEncoding: 'MP3'},
  };

  // Performs the text-to-speech request
  const [response] = await client.synthesizeSpeech(request);
  // Write the binary audio content to a local file
  const writeFile = util.promisify(fs.writeFile);
  await writeFile('output.mp3', response.audioContent, 'binary');
  console.log('Audio content written to file: output.mp3');
}
quickStart();

winsay

This is TTS module for Node.js on windows using Edge.js.

var winsay = require('winsay');

// no callback, fire and forget
winsay.speak("GLaDOS", "Hello, and welcome to the Aperture Science Enrichment Center");

// use default voice in System Preferences
winsay.speak(null, "Hello!");

// output some text to the console after the callback has completed
winsay.speak("Good News', 'You've won the internet!", function () {
     console.log("text to speech complete");
});
console.log("This text is printed before you win the internet.");

// syncronous speak function also available
winsay.speakSync("Red", "A wild Pikachu appears.");
console.log("This text is printed after you encounter the wild Pikachu.");

text-to-speech-nodejs

This is a sample Node.js application for the IBM Watson Text to Speech Service.

You just need to drop in the key as following then run the app.

TEXT_TO_SPEECH_IAM_APIKEY=X4rbi8vwZmKpXfowaS3GAsA7vdy17Qh7km5D6EzKLHL2
TEXT_TO_SPEECH_URL=https://gateway-wdc.watsonplatform.net/text-to-speech/api