How does browser text to speech work?
Modern browsers include the Web Speech API, which provides speech synthesis (text-to-speech) capabilities without any plugins or downloads. This tool uses speechSynthesis to convert your text into spoken audio using voices installed on your operating system. The available voices vary by browser and OS — Windows, macOS, Android, and iOS each offer different options.
Adjusting rate and pitch
The rate slider controls how fast the text is spoken (0.25x to 3x normal speed). The pitch slider adjusts the vocal pitch from low (0) to high (2). Experiment with these settings to find a comfortable listening experience for proofreading, accessibility, or language learning.
Privacy and offline use
Because the speech synthesis runs locally in your browser, your text is never sent to any external server. On most desktop browsers, text-to-speech even works offline once the page has loaded.