Text to Speech Free Online Tool 2026

Last updated March 22, 2026

How Text-to-Speech Works

Text-to-speech (TTS) converts written text into spoken audio. Modern TTS systems use neural networks trained on hours of human speech to produce natural-sounding voices. The Web Speech API provides browser-native TTS without any external dependencies, using the operating system's built-in voices. For higher quality, cloud services like Google Cloud TTS, Amazon Polly, and Azure Cognitive Services offer neural voices.

Web Speech API

// Basic TTS with Web Speech API
function speak(text, options = {}) {
  if (!window.speechSynthesis) {
    console.error('Web Speech API not supported');
    return;
  }

  // Cancel any ongoing speech
  speechSynthesis.cancel();

  const utterance = new SpeechSynthesisUtterance(text);
  utterance.lang   = options.lang   || 'en-US';
  utterance.rate   = options.rate   || 1.0;   // 0.1 to 10
  utterance.pitch  = options.pitch  || 1.0;   // 0 to 2
  utterance.volume = options.volume || 1.0;   // 0 to 1

  // Select a specific voice
  if (options.voiceName) {
    const voices = speechSynthesis.getVoices();
    utterance.voice = voices.find(v => v.name === options.voiceName);
  }

  utterance.onend   = () => console.log('Speech finished');
  utterance.onerror = (e) => console.error('Speech error:', e.error);

  speechSynthesis.speak(utterance);
}

// List available voices
speechSynthesis.onvoiceschanged = () => {
  const voices = speechSynthesis.getVoices();
  voices.forEach(v => console.log(v.name, v.lang));
};

Browser Support and Limitations

• Chrome and Edge have the most voices (including neural voices on Windows).
• Firefox has limited voice selection on some platforms.
• Mobile browsers may require user interaction before speech can start.
• Long texts may be cut off — split into sentences and queue them.
• Voice availability varies by OS and installed language packs.