LLM Broadcaster is a versatile Chrome extension designed to enhance productivity by allowing users to broadcast a single prompt to multiple AI chat services simultaneously. This tool is particularly useful for those involved in writing, research, coding, debugging, planning, and creative tasks. By transforming a dedicated browser profile into a multi-model AI workspace, it eliminates the need for repetitive copy-pasting, enabling users to compare outputs across different models seamlessly.

Key features of LLM Broadcaster include the ability to reuse existing AI tabs without opening duplicates, automatic tab opening for missing services, and built-in groups for organizing prompts by category such as Code, Research, and Creative. Users can also save custom service groups, maintain a local prompt history, and manage their interactions through a convenient popup or persistent side panel. With no API keys or external routing, this extension ensures a streamlined workflow directly within the browser.