NotebookLM

NotebookLM solves a very specific problem: you have a stack of documents you should read but don't have time for. Upload the sources (text, PDFs, web pages, other content) and ask questions across the whole set. NotebookLM answers based on your sources, not on general knowledge, which keeps hallucinations down.

Free in the browser with a Google account. Higher limits and more features come with paid Google AI plans and eligible Google Workspace plans. What you get varies by plan and account type.

More than summaries

What makes NotebookLM especially useful is that it doesn't just summarise in text. It can also turn your sources into visual explanations: infographics, mind maps, videos for a visual walkthrough, and slide-style presentations. For many people this is the biggest draw — you go from text-heavy sources to something you can actually engage with, use for learning and revision, or share with others.