# index-tts/index-tts

An Industrial-Level Controllable and Efficient Zero-Shot Text-To-Speech System

Repository: https://github.com/index-tts/index-tts
Canonical: https://ross.abutalabs.com/products/index-tts
Language: Python
License: NOASSERTION
License Family: other
Topics: bigvgan, cross-lingual, indextts, text-to-speech, tts, voice-clone, zero-shot-tts
Last push: 2026-08-18T06:52:28+00:00

## Health v2 (maintenance only)
Score: 78/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 73, longevity 40
- inputs: {"age_days": 573, "days_push": 15, "days_rel": 20, "gap_med": 173.0, "n_releases_24m": 3}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 23511, forks 2828 (observed 2026-08-28T04:11:35.007417+00:00)

## What it is
IndexTTS is an industrial-level zero-shot text-to-speech system that clones a voice from a single reference audio clip. The latest IndexTTS-2.5 release supports Chinese, English, Japanese, Spanish, and Arabic with fine-grained emotion, speed, and pronunciation control.

## Use cases
- clone a voice from a short audio sample
- generate speech from text in multiple languages
- control emotion and speaking speed of synthesized speech
- build a voiceover or audiobook generation pipeline
- run zero-shot TTS locally on GPU
- dub content with cross-lingual voice cloning

## When to choose
- you need high-quality voice cloning from a single reference clip
- you need multilingual TTS with fine-grained emotion and pronunciation control
- you want a self-hosted, efficient TTS system with active development

## When to avoid
- you need a fully permissively licensed model (license is custom/non-standard)
- you have no GPU and need fast real-time synthesis
- you need a managed cloud TTS API rather than running models yourself

## Facets
- artifact type: library
- maturity: active
- function: tts, speech-recognition, machine-learning, llm-inference
- domain: speech-processing, artificial-intelligence, deep-learning
- platform: python, cross-platform, cli
- tags: text-to-speech, voice-cloning, zero-shot-tts, bigvgan, cross-lingual, emotion-control, indextts, audio, gpu

## Member repositories
- index-tts/index-tts (main) score 78

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:35.007417+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:56:27.521149+00:00, confidence not recorded.
  - readme: https://github.com/index-tts/index-tts (fetched 2026-08-28T04:11:35.007417+00:00, sha d73cf199e918)
- Data as of 2026-08-30T08:39:29.467469+00:00.