LLM Text Summarizer is a Chrome extension that uses advanced AI from OpenAI to produce high-quality summaries of selected text. Users can simply select the text they want summarized, right-click, and choose 'Summarize' from the context menu. The extension processes the text with OpenAI's API and provides a concise summary in a modal window. The summary can be easily copied to the clipboard, and the tool supports Markdown for better readability. It is customizable with personal OpenAI API keys.