IndexTTS-2 - Expressive TTS & Voice Cloning - One Click Installer

IndexTTS-2 is our next-generation text-to-speech and voice cloning toolkit that makes it easy to turn text into expressive, natural-sounding speech. With two one-click Windows installers, you can set up Gradio or ComfyUI workflows quickly — no setup headaches, just one click and you're ready to generate.
IndexTTS-2 is an expressive TTS and voice cloning system built to deliver high-quality, emotion-aware speech. It supports voice cloning by using reference audio to tailor output to a desired voice.
Index TTS Original GitHub Repo: https://github.com/index-tts/index-tts
ComfyUI IndexTTS-2 Custom Node GitHub Repo: https://github.com/snicolast/ComfyUI-IndexTTS2
 
Gradio Installer Package — Automatic Setup
Deepspeed 13.1
Miniconda with pynini==2.1.6
Triton for Windows
PyTorch 2.8.0+cu128
Default models downloaded and placed into their folders
 
ComfyUI Installer Package — Automatic Setup
Sage Attention 2
Flash Attention 2
Miniconda with pynini==2.1.6
Triton for Windows
PyTorch 2.8.0+cu128
Default models downloaded and placed into their folders
 
System Requirements
GPU: Nvidia RTX 4090, 5090 series, or equivalent (for best performance)
CUDA-compatible GPU with at least 8 GB VRAM
Operating System: Windows
Storage: At least 40 GB free
FFmpeg: https://www.ffmpeg.org/download.html
 
Usage Notes
Create a dedicated folder for the installer files and run the installer from that folder.
Gradio: upload a reference audio, type the text to synthesize, then click the synthesize button.
ComfyUI: upload a reference audio, enter text, and press the run button.
Higher emotion strength can reduce similarity to the reference voice. Lower it if you want the output to more closely resemble the reference.
Both interfaces allow you to upload a different reference audio for the desired emotion/style.
To bypass reference audio in ComfyUI, right-click the reference nodes and select bypass.