The Sitemap → Filter → Insert to NotebookLM is a Chrome extension designed to streamline the process of managing URLs from website sitemaps. This free tool allows users to automatically discover and extract URLs, offering multiple options for URL input, including manual entry and web crawling. By utilizing advanced language models, it filters URLs based on relevance to specific topics, enhancing the user's ability to curate their resources effectively.

A notable feature of this extension is its seamless integration with NotebookLM, allowing users to easily insert selected links directly into their notebooks. Additionally, it includes an auto-focus assist function that simplifies the process of adding sources. Overall, this extension is a valuable asset for anyone looking to efficiently manage and organize their online resources.