Open-LLM-VTuber is an experimental open-source tool that enables voice-based interaction with Large Language Models (LLMs). It features a Live2D avatar, interrupt capability, and customizable components for LLM inference, speech recognition, and synthesis. Users can run it offline for privacy or online, with long-term memory support. This tool is ideal for developers, researchers, and AI enthusiasts who want to experiment with voice-interactive AI technology, offering flexibility, customization, and privacy features that set it apart from commercial alternatives.