IndexTTS

Summary

IndexTTS is ranked #14 of 217 in text-to-speech software on Everything Xiaomi. It runs on API, Linux, Self-hosted, Web, Windows. There is a free plan.

Compared on text-to-speech software

Voice cloning

Yesgithub.com

API access

Yesgithub.com

Export formats

WAVgithub.com

Platforms

Web, Windows, Linux, API, self_hostedgithub.com

Facts

Product

IndexTTS is a zero-shot text-to-speech system that clones a voice from a single reference audio clip.github.com · 9 Oct 2026

Languages

IndexTTS-2.5 supports Chinese, English, Japanese, Spanish, and Arabic.github.com · 9 Oct 2026

Voice and emotion controls

The project describes fine-grained emotion control using emotional reference audio, emotion vectors, or text-based emotion input.github.com · 9 Oct 2026

Speaking speed

IndexTTS-2.5 supports duration_factor values from 0.5 to 2.0, with 1.0 as normal speed.github.com · 9 Oct 2026

Pronunciation

IndexTTS-2.5 supports pronunciation control using Chinese Pinyin, English CMU phonemes, and Japanese Kana.github.com · 9 Oct 2026

Deployment

The project documents a local WebUI, a Python API, and production serving through a vLLM recipe.github.com · 9 Oct 2026

Installation platforms

The README gives installation guidance for Windows and Linux and notes that DeepSpeed may be difficult to install on Windows.github.com · 9 Oct 2026

Model downloads

The README provides model download instructions using Hugging Face or ModelScope.github.com · 9 Oct 2026

Hardware

The README recommends NVIDIA CUDA Toolkit 12.8 or newer on Linux or Windows when a CUDA installation error occurs.github.com · 9 Oct 2026

License

The project says it is released under the bilibili Model Use License Agreement and asks users to read its disclaimer before use.github.com · 9 Oct 2026

Commercial use

For commercial usage and cooperation, the project directs users to contact [email protected].github.com · 9 Oct 2026

Official channel and security

The maintainers say the GitHub repository is their only official channel and that they cannot guarantee the security, accuracy, or timeliness of other websites or services.github.com · 9 Oct 2026

Support

The README lists QQ groups, a Discord server, and [email protected] as community contact options.github.com · 9 Oct 2026

Notable pronunciation limit

For IndexTTS-2, Pinyin control works only for supported Chinese Pinyin cases listed in the project's vocabulary file.github.com · 9 Oct 2026

Purpose

IndexTTS is a zero-shot text-to-speech system that clones a voice from a single reference audio clip.github.com · 9 Oct 2026

Emotion control

Speech emotion can be controlled with an emotional reference recording, an emotion vector, or text.github.com · 9 Oct 2026

Speed control

IndexTTS-2.5 supports speaking speed adjustment through duration_factor from 0.5 to 2.0.github.com · 9 Oct 2026

Interfaces

The repository provides a browser-based WebUI and a Python API for inference.github.com · 9 Oct 2026

Requirements

The setup instructions call for Git, uv, and, for Linux or Windows CUDA installations, CUDA Toolkit 12.8 or newer.github.com · 9 Oct 2026

Acceleration

Optional DeepSpeed support may speed up inference on some systems, but the repository says results depend on hardware, drivers, and operating system.github.com · 9 Oct 2026

Official channel

The maintainers identify the GitHub repository as the only official channel maintained by the core team and say other sites or services are not official.github.com · 9 Oct 2026

Where it ranks on Everything Xiaomi

• Best Text-to-Speech Software in 2026#14 of 217
• Best Voice Cloning Software in 2026#4 of 24

Sources

• github.com/index-tts/index-tts· checked 9 Oct 2026