index-tts is an industrial-grade, controllable, and efficient zero-shot text-to-speech system that generates natural speech from text without speaker-specific training.
Last Updated Oct 19, 2026
About
index-tts is an industrial-grade, controllable, and efficient zero-shot text-to-speech (TTS) system. It aims to provide high-quality, natural, and flexible speech synthesis, allowing users to generate realistic speech from text input without pre-recording or training specific speaker models. Built on advanced deep learning techniques, it enables fast text-to-speech conversion while offering fine-grained control over voice style, emotion, and prosody.
Key Features
**Zero-shot synthesis: ** Generate speech for any speaker without prior training on that speaker, significantly lowering the barrier to use.
**Precise control: ** Adjust parameters such as speed, pitch, volume, and emotion to suit various scenarios.
**Efficient inference: ** Optimized model architecture and inference process for low-latency speech generation, suitable for real-time applications.
**Multilingual support: ** Supports multiple languages, providing convenience for global users.
**Easy integration: ** Simple API interface for developers to quickly integrate into existing applications.
Pricing & Fees
- **Industrial-grade stability: ** Trained on large-scale data and optimized for stable performance across various scenarios.
- **High naturalness: ** Generated speech closely resembles human voice, natural and fluent, enhancing user experience.
- **Strong controllability: ** Users can adjust various aspects of the voice for personalized output.
- **Open source and free: ** The project is open source, allowing users to freely use, modify, and extend it, reducing development costs.
Who It's For
- Developers: Those who want to add voice functionality to their applications can quickly integrate this TTS system.
- Content creators: Those who need voiceovers, audiobooks, podcasts, etc., can save recording time.
- Researchers: Those interested in speech synthesis technology can use this system for experiments and development.
- Enterprises: Businesses that need batch voice generation, such as customer service systems and voice assistants.
Related Tutorials
View all →
Related Tools
View all →
NaturalReader NaturalReader is an AI text-to-speech platform that converts documents, webpages and scanned text into natural-sounding audio for personal, commercial and educational use. 
VoxCPM - Voice Cloning & Speech Synthesis VoxCPM generates natural, expressive speech from text. It leverages advanced LLMs to create realistic voiceovers for various applications. 
LOVO - AI Voice Generator and Text to Speech LOVO offers 500+ voices in 100+ languages, making it easy to generate realistic AI voiceovers for any project. 
AI Translator - Accurate Translation AI Translator provides high-accuracy translations with 98% precision, supporting 1200+ AI models and 100+ languages. 
FunASR - End-to-End Speech Recognition Toolkit Industrial-grade speech recognition toolkit. 170x realtime on GPU, 50+ languages, speaker diarization, emotion detection, OpenAI-compatible API, vLLM acceleration, and agent integration.