TTS WebUI provides a browser-based interface for running and comparing dozens of text-to-speech and audio generation models. It supports models like GPT-SoVITS, Tortoise TTS, MusicGen, Bark, SeamlessM4T, CosyVoice, and others through extension-based architecture. Users can configure, generate, and evaluate audio outputs via the UI, with support for Docker, Google Colab, and local installation.