# IndexTTS

Bilibili's zero-shot TTS with precise duration control and emotion control (IndexTTS2). IndexTTS is free, with no paid plan attached, at github.com.

## Facts

- **Pricing tier:** Free
- **Works on:** Self-hosted
- **Works in browser:** No

## Capabilities

- Bilibili's zero-shot TTS with precise duration control and emotion control (IndexTTS2)
- Strong Chinese pinyin correction plus English
- Open weights and demo on Hugging Face

## FAQ

### What is IndexTTS?

IndexTTS is listed under AI Voice & Speech, in the Content & Media Generation category on Flocci AI Tools. Bilibili's zero-shot TTS with precise duration control and emotion control (IndexTTS2). It is free, with no paid plan attached, and it lives at github.com.

### Is IndexTTS free?

IndexTTS is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use IndexTTS in a browser, or is there an app?

IndexTTS needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on self-hosting.

### What can IndexTTS do?

IndexTTS does 3 things the catalog singles out: Bilibili's zero-shot tts with precise duration control and emotion control (indextts2); strong chinese pinyin correction plus english; open weights and demo on hugging face.

### What is the best free alternative to IndexTTS?

Copilot Audio Expressions is the closest free alternative: it sits in the same AI Voice & Speech sub-category and is free. Kokoro Web, Zonos and Chatterbox (Resemble AI) also start free. The full list is on the alternatives page.

## Related

- [IndexTTS alternatives](https://aitools.flocci.in/alternatives/indextts)
- [AI Voice & Speech](https://aitools.flocci.in/category/content-media-generation/ai-voice-speech)
- [Best free AI voice and text-to-speech tools](https://aitools.flocci.in/best/best-ai-voice-speech)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/indextts

Facts last verified: October 2026