IndexTTS
Industrial-level text-to-speech system with controllable voice and pronunciation
What is IndexTTS?
IndexTTS is a Text to Speech tool. Industrial-level text-to-speech system with controllable voice and pronunciation. IndexTTS is free to use. It is aimed at developers and audio engineers.
IndexTTS is an industrial-level text-to-speech system designed for efficient zero-shot voice generation. It offers controllable pronunciation, emotion, and speaking speed, supporting multiple languages including Chinese, English, Japanese, Spanish, and Arabic. The system is deployable via vLLM for faster inference.
Built for developers and audio engineers.
Key capabilities
Features
Pronunciation Control
Controls Pinyin, CMU, and Japanese-Kana pronunciation formats
Emotion Control
Adjusts emotional tone in generated speech
Speaking Speed Control
Adjusts the speed of speech output
Model Zoo
News
Demos
Prerequisites
Install Dependencies
GPU Acceleration Check
Usage Instructions
Use cases
- Generate multilingual text-to-speech with controlled pronunciation
- Adjust emotional tone in voice outputs
- Control speaking speed for audio content
Popular use cases
Who it's for
Pros & cons
Pros
- Free plan available
Cons
No documented limitations yet.
Pricing
Free.
Developer & API
Open source· 24.3K stars· 2.9K forks
FAQ
What is IndexTTS?
IndexTTS is a Text to Speech tool. Industrial-level text-to-speech system with controllable voice and pronunciation. IndexTTS is an industrial-level text-to-speech system designed for efficient zero-shot voice generation. It offers controllable pronunciation, emotion, and speaking speed, supporting multiple languages including Chinese, English, Japanese, Spanish, and Arabic. The system is deployable via vLLM for faster inference.
Is IndexTTS free?
Yes, IndexTTS is free to use.
How much does IndexTTS cost?
IndexTTS is free to use.
Who should use IndexTTS?
IndexTTS is built for developers and audio engineers. Common uses: generate multilingual text-to-speech with controlled pronunciation, adjust emotional tone in voice outputs and control speaking speed for audio content.
Is IndexTTS open source?
Yes, IndexTTS is open source.
What are the best alternatives to IndexTTS?
Similar tools on AiByts include iSpeech, Natural Readers, ElevenLabs, Laxis and Liso.
Details are compiled from IndexTTS's website and public sources, last verified Oct 3, 2026. Features and pricing change — confirm on the official site before you buy.
Try IndexTTS
Free
Tags
- Text-to-Speech
- Voice Cloning
- Pronunciation Control
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