NotebookLM

NotebookLM is an AI-powered research and note-taking assistant developed by Google Labs. Unlike general-purpose chatbots that draw from broad training data, NotebookLM is designed to be source-grounded — it only answers questions based on the documents, PDFs, web pages, and notes you provide, with every response citing specific sources.

NotebookLM leverages Google's Gemini model to provide deep analysis of your uploaded materials. It supports features like automatic note generation, FAQ creation, study guides, briefing docs, timelines, and the popular Audio Overview feature that converts your source materials into a natural-sounding podcast-style dialogue between two AI hosts. NotebookLM is available at notebooklm.google.com.

To use NotebookLM, you need a Google account and access to the service at notebooklm.google.com. The workflow is straightforward:

1. Create a notebook — Start a new notebook for each research topic or project
2. Upload sources — Add Google Docs, PDFs, text files, web URLs, or YouTube transcripts (up to 50 sources per notebook, 500,000 words total)
3. Start asking questions — NotebookLM analyzes all sources and generates grounded answers with citations
4. Generate outputs — Create study guides, briefing docs, timelines, FAQs, or Audio Overviews

Supported Source Types

• Google Docs — Native Google Workspace integration
• PDF files — Upload research papers, reports, and books
• Web pages — Paste URLs for automatic content extraction
• YouTube transcripts — Analyze video content through transcripts
• Text files — Plain text or Markdown documents
• Audio files — Source transcriptions via speech recognition

The core differentiator of NotebookLM is its source grounding. Unlike a standard AI chatbot that may generate plausible-sounding but incorrect information, NotebookLM only responds based on the sources you provide. Every response includes inline citations that show exactly which source and which passage supports each claim.

This grounding makes NotebookLM particularly useful for academic research, legal analysis, technical documentation review, and any task where factual accuracy and verifiability are critical. You can click on any citation to see the original source text, and the assistant will explicitly say when it cannot find relevant information in your sources rather than guessing.

• Explicit citations — Every claim links to its source passage
• Source panel — Side-by-side view of sources and the AI response
• Citation accuracy — NotebookLM does not fabricate citations or references
• Confidence indicators — Clear signals when information is well-supported vs. inferred

One of NotebookLM's most distinctive features is Audio Overviews, which convert your source materials into a natural-sounding podcast-style discussion between two AI hosts. The hosts discuss the key concepts, explore connections between ideas, and present the material in an engaging conversational format.

The audio generation uses Google's advanced text-to-speech models to produce realistic dialogue with natural pacing, intonation, and back-and-forth interaction between the two hosts. Audio Overviews can be generated with a single click from any notebook and are downloadable as MP3 files. This feature has gained significant popularity for turning dense research papers into listenable content.

• Two-host format — Dynamic discussion between AI hosts with distinct voices
• Multi-language — Available in 13+ languages including English, Chinese, Spanish, and French
• Customizable focus — Direct the hosts to emphasize specific topics or perspectives
• Shareable — Generate shareable links for Audio Overviews

NotebookLM includes several automated document analysis tools that help you extract maximum value from your sources:

Feature	Description
Study Guide	Auto-generated study notes with key concepts, definitions, and questions
Briefing Doc	Executive summary of source materials with actionable insights
FAQ	Frequently asked questions with grounded answers from your sources
Timeline	Chronological organization of events and concepts from your sources
Notebook Guide	Smart suggestions for follow-up questions and related topics

• Source-grounded Q&A — Answers only from your provided sources with inline citations
• Multi-source analysis — Upload up to 50 sources per notebook for cross-document synthesis
• Note-taking — Save AI responses as notes, organize them, and export to Google Docs
• Audio Overviews — Convert any set of sources into a podcast-style audio discussion
• Context window — Up to 500,000 words per notebook for comprehensive document analysis
• Privacy — Google does not train on your uploaded sources or notebook content
• Export — Export notes, sources, and audio to Google Docs or download as files