Grok Text to Speech

Voice & speech playground

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Synthesize text with expressive voices, inline speech tags, language selection, and downloadable MP3 or WAV audio.

Microphone access requires HTTPS or localhost and your permission. Audio is sent to the selected provider only when you submit a request or start a live session. Use headphones for live conversations.

Connection

Use the native SpaceXAI endpoint.

Endpoint

Authentication Mode

API Key

Advanced

Speech controls

Language / locale

Choose a documented language or locale, or select Custom to enter another provider-supported code. Provide text in the selected language. Auto-detect sends the auto language code.

Voice

Choose a built-in voice, or select Custom to enter another documented voice ID. Grok also accepts an existing authorized custom voice ID.

Output format

Raw codecs are decoded locally to WAV for playback and download. MP3 and WAV retain their requested format.

Speech speed

0.7 to 1.5; 1 is normal speed. Inline [pause], [laugh], and wrapping speech tags are sent as written.

Sample rate

MP3 bit rate

Streaming latency optimization

Normalize written text before synthesis Character-level timestamps

Pronunciation replacements (JSON object)

Speech tags: [pause] [long-pause] [hum-tune] [laugh] [chuckle] [giggle] [cry] [tsk] [tongue-click] [lip-smack] [breath] [inhale] [exhale] [sigh]. Wrap phrases with <soft>, <whisper>, <loud>, <build-intensity>, <decrease-intensity>, <higher-pitch>, <lower-pitch>, <slow>, <fast>, <sing-song>, <singing>, <emphasis> and the matching closing tag.

Ready. Configure your connection to begin.

Optional microphone dictation

Audio uploads are limited to 25 MB in this playground; microphone recordings stop at five minutes. Dictation makes a separate, billable Grok Speech to Text call and replaces the text below only after it succeeds.

Text to speak

Estimated cost Unavailable(Reported Cost: Unavailable)

xAI TTS: $15/1M characters. Estimate uses submitted text, or the current draft before the first request.

Generated speech will appear here with playback and download controls.