IndexTTS
IndexTTS is an industrial-grade text-to-speech system by Bilibili that delivers high-quality voice synthesis with zero-shot voice cloning, multilingual support, and emotion control capabilities.
Index TTS 2.0 Voice Generation
Generate natural and clear speech using reference audio and text
app.audioapp.click-upload
app.audioapp.audio-file-requirements
0 / 2000 characters
Credits Needed: 0
Pricing based on estimated audio duration, differentiated for CJK and Latin languages
No audio generated yet
Upload reference audio and enter text to generate
Key Features of IndexTTS
IndexTTS is an industrial-grade text-to-speech system developed by Bilibili, offering zero-shot voice cloning, multilingual support, and emotion control capabilities.
Zero-Shot Voice Cloning
Replicate any speaker's voice characteristics using just a short reference audio clip without additional training
Pronunciation Correction
Advanced pinyin-based correction system that handles polyphonic characters, rare words, and pronunciation nuances perfectly
Multilingual Support
Seamlessly synthesize speech in multiple languages including Chinese and English with natural code-switching
Emotion Control
Control emotional tones in synthesized speech to create more expressive and natural-sounding audio
High-Quality Audio
Integrated BigVGAN2 vocoder ensures superior audio quality with high speaker similarity (MOS: 4.01)
Pause Control
Precisely control speech rhythm and pauses through punctuation marks for natural-sounding delivery
Popular Use Cases
Discover how IndexTTS can transform your audio content creation workflow
Content Creation
Generate natural voiceovers for videos, podcasts, and educational content without recording equipment
Audiobook Production
Convert books and articles into engaging audiobooks with consistent voice quality and emotional expression
Language Learning
Create pronunciation examples and listening materials for language education with native-like quality
Accessibility
Make written content accessible through high-quality text-to-speech conversion for visually impaired users
Voice Cloning
Preserve and replicate voices for personalized AI assistants, virtual characters, or memorial purposes
Multilingual Media
Create multilingual content with natural-sounding voices in different languages for global audiences
Text Input Guide for IndexTTS
Learn how to craft effective text inputs for optimal voice synthesis results
Essential Elements
Clear Text Structure
Use proper punctuation to control pauses and rhythm in the generated speech
Pronunciation Hints
For Chinese text, use pinyin notation to correct polyphonic characters
Emotion Tags
Specify emotional tones to make speech more expressive and natural
Language Mixing
Seamlessly mix Chinese and English in your text input
Pro Tips for Better Results
Use Natural Punctuation
Add commas, periods, and exclamation marks naturally to control speech rhythm and pauses
Quality Reference Audio
For voice cloning, use clear reference audio with minimal background noise (5-10 seconds is optimal)
Break Long Texts
Split very long texts into smaller chunks for more consistent quality and easier processing
Test Pronunciation
For Chinese text with rare characters, test pronunciation and add pinyin corrections if needed
Basic vs Enhanced Input
"今天天气很好"
"今天天气很好，让我们出去走走吧！"
"I have great news to share"
"[Excited] I have great news to share with everyone!"
How to Use IndexTTS
Follow these simple steps to generate high-quality speech from your text
Prepare Your Text
Enter or paste the text you want to convert to speech. Use proper punctuation and add pronunciation hints if needed.
Upload Reference Audio (Optional)
For voice cloning, upload a 5-10 second clear audio sample of the target voice. Skip this step to use default voices.
Select Language & Emotion
Choose your primary language (Chinese/English) and select an emotion tag if you want expressive speech.
Generate & Download
Click generate to create your audio. Preview the result and download the audio file when satisfied.
Quick Tips
- •Reference audio should be clear with minimal background noise for best voice cloning results
- •Longer texts may take more time to process - consider breaking them into smaller segments
- •Experiment with different punctuation patterns to achieve your desired speech rhythm
- •For Chinese text, pinyin corrections can significantly improve pronunciation accuracy
The quality of generated speech depends on input text clarity and reference audio quality (for voice cloning). For best results, use well-formatted text with natural punctuation.
Frequently Asked Questions
Find answers to common questions about IndexTTS
Ready to Create Natural Speech?
Start using IndexTTS today to transform your text into high-quality, natural-sounding speech with advanced voice cloning capabilities
IndexTTS is trained on 25,000 hours of Chinese audio and 9,000 hours of English audio, ensuring professional-grade quality for your projects