API TOOL CALLS

Free text to speech and voiceover

Type or paste English text, choose a voice and select Speak. Listen as each part finishes, then download your voiceover.

Your privacy: your text never leaves this browser. Speech and audio exports run on your device.

Make your voiceover

0 / 5,000 characters

US English

First Speak downloads a 92 MB voice model, plus about 11 MB runtime, 6–7 MB pronunciation dictionary and a 0.5 MB voice. Cached after the first time when browser storage is available.

Enter English text to start.

Your text in the parts the voice speaks, each as wide as its text; the part playing is marked, and once the voiceover is ready choosing one moves the player there.

WAV: 24 kHz mono. M4A uses AAC when your browser can encode it; otherwise WebM uses Opus.

Words we guessed

Unknown words use a spelling guess. Select a word to add a pronunciation fix.

No guessed words yet.

    Pronunciation fixes

    Use a familiar English respelling, for example Nguyen = win. Saved on this device when browser storage is available.

      Kokoro and Misaki: Apache-2.0 licences and source inventory. MP3 uses LAME / lamejs (LGPL-3.0), served separately and unchanged; complete encoder source. LAME project.

      Frequently asked questions

      Can I use the voiceover commercially?

      Kokoro is licensed under Apache-2.0, which allows commercial use. We give no legal advice; check the rights for your text and intended use.

      Which languages and accents are supported?

      English only for now, with US and UK voices for women and men. The chosen voice selects the matching English pronunciation dictionary.

      Why does the first run download 92 MB?

      Natural voices run on the Kokoro model on your device. First Speak downloads 92 MB plus the runtime, chosen voice and dictionary. Browser storage caches them after the first time when available.

      How do I fix a mispronounced word?

      Choose a word under Words we guessed, or enter any word in Pronunciation fixes. Add an English respelling, such as Nguyen = win, then Speak again. Fixes stay in this browser when storage is available.