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The TTS Playground makes it easy to try out Inworld’s TTS capabilities through an interactive playground. It can be used to find the perfect voice for your project, test different text inputs, adjust voice settings, and experiment with audio markup tags. tts-playground.png

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Get Started

1

Go to Inworld Portal

In Portal, select TTS Playground from the left-hand side panel.
2

Enter text

Enter the text you want to convert to speech. If you need some ideas, you can select one of the suggestion chips at the bottom of the screen. Note that the playground accepts up to 2,000 characters per request. For longer content, see Long Text Input.
3

Select a voice

On the right-hand side, click on the voice dropdown to browse available voices. You can filter by language or search by name, and click the play button next to each voice to hear how the voice sounds. Select a voice.
4

Generate speech

Click the “Generate” button on the bottom right. The audio will automatically start playing once it’s been generated. You can also download the clip to save it.

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Advanced Features

For greater control over the generated audio, you can try out the following:
  1. Try a different model - Select a different model from the right-hand side panel to see how it compares. See Models for more information about each model.
  2. Adjust configurations - Use the sliders on the right-hand side panel to adjust Temperature and Talking Speed. See here for more information.
  3. Experiment with audio markups - Try adding audio markups, such as [happy] or [cough], to your input text to control emotional expression, delivery style, and non-verbal vocalizations. See here for more information.
In addition, you can enable the Highlight words toggle in the right-hand panel to visualize word-level timestamps during playback. This feature is currently only available for English when using the inworld-tts-1.5-mini and inworld-tts-1.5-max models.

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Create a Voice

In the TTS Playground, click + Create a Voice to design a new voice from a text description or clone one from audio:
  • Voice Design — Describe the voice you want in text (age, accent, tone, etc.) and get AI-generated voice candidates
  • Voice Cloning — Clone a voice from 5–15 seconds of audio samples

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Next Steps

Ready for more? Whether you’re looking to clone a voice, design one from text, or start building with our API, we’ve got you covered.

Voice Design

Create a voice from a text description—no audio needed.

Voice Cloning

Create a personalized voice clone with just 5 seconds of audio.

Best Practices

Learn tips and tricks for synthesizing high-quality speech.

Quickstart

Learn how to make your first API call in minutes.