Text to speech: turn a script into a natural voiceover
Pick Eleven v4 or Gemini 3.8, choose a voice, direct the delivery, and download the MP3.
10M+ files processed since 2021
0 / 300 characters
How to turn text into speech
- 1
Type or paste your script.
- 2
Choose a model and a voice. For Gemini, add a style such as "warm and calm".
- 3
Generate the speech, play it, and download the MP3.
A voiceover from a script, in the voice you choose
Audo turns a written script into an MP3 voiceover with four voice models side by side: Eleven v4 and Eleven v4 Turbo from ElevenLabs, and Gemini 3.8 Flash and Flash-Lite from Google. Pick the model, pick one of its voices, and Audo reads up to 8,000 characters in one go, about eight minutes of speech. Each model keeps its own way of being directed, so the tags you already know work as they do on the model's own site.
The models are good at different things. On Artificial Analysis' blind listening test, people preferred Eleven v4 over every other model. Gemini 3.8 Flash speaks more than 130 languages and costs the least, and listeners on Design Arena preferred it when they described the voice they wanted.
Use the MP3 under a video, as a podcast intro, for a course lesson, or for a scene with several characters, one line at a time. Mix it with music in Mix audio, or set it to a waveform in MP3 to MP4. The same tool works from your AI assistant through Audo's MCP server, and from code through the API.
Questions
Is Audo's text to speech free?
Audo reads scripts up to 300 characters free, about 20 seconds of speech, 3 times a day, with any model and no sign-up. Longer scripts, up to 8,000 characters, are paid per 1,000 characters at each model's rate, shown before you generate, and charged only if it works. There is no subscription.
Which model should I pick?
Eleven v4 ranked first on Artificial Analysis' blind listening test with each model's own voices, and Eleven v4 Turbo is close behind at half the price. Gemini 3.8 Flash ranked first on Design Arena, where listeners steer the voice with a description, and costs the least.
How do I direct the voice?
Eleven v4 and Eleven v4 Turbo follow directions in square brackets inside the script, such as [whispers] or [laughs]. Gemini takes a style for the whole script, such as "whispered urgently", and short tags in angle brackets, such as <laugh>.
How much does a long script cost?
Eleven v4 is $0.20 per 1,000 characters, about a minute of speech; Eleven v4 Turbo $0.10; Gemini 3.8 Flash $0.08; and Gemini 3.8 Flash-Lite $0.05. Spaces and new lines count as characters.
More tools
- Transcribe audioSpeech to text, who said what.
- Text to SRTSync a script to audio.
- Auto captionsPut your words on the picture.
- Remove filler wordsCut the ums and uhs.
- Audio translatorSpeech into translated text.
- Translate subtitlesSubtitles in more languages.
- Audio enhancerMake any recording sound studio‑quality.
- Remove noiseClears the background, keeps your voice.
- Remove echoMake voices sound close.
- Vocal removerSeparate vocals, music, and stems.
For AI assistants and developers
Ask ChatGPT, Claude, or a coding agent to do this for you, or call it from your own code. When an agent's free result is cut short, it gives you a link to finish the whole file, no sign-up.
Show the free API call
curl -F 'text=Welcome back to the show.' -F model=eleven_v4 https://audo.ai/api/try/text-to-speech -D response.headers -o response.body