NotebookLM — AI chat
with your documents
50 sources, 500K words each, automatic Audio Overviews — NotebookLM from Google is the most powerful AI Research Tool available, and you can start for free within 5 minutes.
What is NotebookLM — and how is it different from ChatGPT?
NotebookLM is a unique research tool developed by Google, based on Gemini 1.5 Pro. The critical difference from ChatGPT: NotebookLM works exclusively with the documents you uploaded. It doesn't "know" things on its own — every answer comes with precise citations to the original source.
What makes it special: Zero hallucinations on your topics (because it doesn't make up information not in the documents), 50 sources in a single Notebook with up to 500,000 words per source, andAudio Overviews — a unique ability to create an AI podcast from your documents.
| Capability | NotebookLM | ChatGPT | Claude |
|---|---|---|---|
| Knowledge source | Your documents only | General knowledge + internet | General knowledge |
| Hallucinations | Minimal (from documents) | Possible | Low |
| Citations | Yes, precise | No | Partial |
| Audio Overviews | Yes, unique | No | No |
| Price | Free | $20/month for Plus | $20/month for Pro |
from 50 sources to500 sources, from 3 to50 Audio Overviews per day, Teams Sharing, Priority Access and 1,000 Notebooks. For heavy users — worth every penny.
Setup in 5 minutes
NotebookLM requires no installation. Everything works in the browser:
- Go tonotebooklm.google.com with a regular Google account
- Click "New Notebook" and create a new notebook with a descriptive name (by project)
- Click "Add Sources" — choose PDF, a Google Doc, a URL, YouTube, audio or text
- Wait 2–30 seconds for processing (depending on size)
- Ask a question in the chat box and get an answer with citations
Source types — what you can upload
Up to 500,000 words per file. For reports, contracts, research and business documents. The best format for accurate results.
A direct connection from Google Drive. Changes in the original document require a manual "Refresh" click in NotebookLM.
Imports a transcript automatically. Works with videos that have captions. Best with lecture and tutorial videos.
Extracts content from public sites. Doesn't work with sites that require a Login, heavy JavaScript, or block bots.
Audio files — NotebookLM will transcribe and index them. Excellent for podcasts, recorded lectures and meetings.
Pasting text directly. Useful for content from Slack, emails, API documentation, or any source not in an accessible format.
Best Practices for source quality
- Native PDFs are better — a PDF created directly (not scanned) gives much better results than OCR.
- Focused content is better — a Notebook on a single topic gives deeper answers than a general one.
- Add context — after adding a source, ask "explain what this document is about" to check it was understood correctly.
- Video with captions — make sure the YouTube video has accurate captions, not poor auto-generated ones.
Chatting with documents — citations and Groundedness
NotebookLM's interface is a regular chat, but with two big advantages: every answer comes with numbered citations that point to the exact paragraph in the original document, andGroundedness — the confidence percentage that the answer is based on the documents.
10 questions that give great results
"Summarize this document in 5 key points"
A summary with citations for each point. Perfect for briefings and meetings.
"Find contradictions between the documents"
With multiple documents, NotebookLM will point out inconsistencies. Golden for contract review.
"Write an FAQ based on the documents"
Ready-made Q&A — for Documentation, Onboarding and support.
"Identify all the risks mentioned"
Risk analysis from contracts, Compliance and policy documents.
"Create a Timeline of the events"
A chronological timeline — useful for research, legal cases and historical documentation.
"What are the steps to perform [process]?"
Cross-references scattered information and presents it as an action list — for work procedures and SOPs.
"Find all the quantitative data"
Collects financial data and statistics scattered throughout the document.
"Compare [document A] to [document B]"
A source-based comparative analysis — for choosing vendors, contracts and policies.
"Write a presentation on the topic"
A slide structure with key points — a starting point for presentations.
"What are the author's underlying assumptions?"
A deep critical analysis — for literature review and academic research.
Audio Overviews — the feature everyone is talking about
Audio Overview is NotebookLM's most unique feature: the tool generates a full AI podcast of two hosts in human-like synthetic voices, who hold a real conversation about your documents — with context, questions and examples.
How to generate an Audio Overview
- Open a Notebook with relevant documents
- In the right panel, find "Notebook Guide"
- Click "Audio Overview" → "Generate"
- Wait 2–5 minutes for processing
- Listen, download as MP3, and share directly from NotebookLM
Tips for a quality Audio Overview
- Focused sources = a better podcast — 3–5 documents on one topic give a more cohesive podcast than 20 documents on different topics.
- Add an instruction before Generate — you can ask to "focus on X and not Y" before creating the audio.
- Share on Slack and by email — an Audio Overview is a great way to share information with a team without requiring everyone to read.
- Captions available — NotebookLM provides a full Transcript for every Audio Overview.
Study Guide — automatic outputs
The Notebook Guide (right panel) offers automatic outputs generated with one click from all the documents in the Notebook:
Automatic Q&A. Excellent for self-testing, Documentation and customer support.
Exam questions with detailed answers. Perfect for students and exam prep.
Executive Summary — a professional executive summary to share with people who only need the gist.
A chronological timeline of all the events. Useful for historical research and legal cases.
10 detailed use cases
1. Academic research — analyzing 50 papers
Upload 50 scientific papers and ask: "What is the consensus?", "Which papers contradict each other?", "What gaps haven't been researched yet?". Saves dozens of hours of literature review.
2. Meeting prep — an instant Briefing
Upload an Agenda + background documents + a Transcript from a previous meeting. Ask: "What was decided in the previous meeting?", "What's still open?", "Prepare a Briefing for the next meeting".
3. A knowledge podcast — Audio Overview for complex content
A complex technical document? A whole newspaper? A long guide? Create an Audio Overview and absorb the information on your commute — without reading a single line.
4. Legal Review — contract analysis
Upload 10 contracts and ask: "Which unusual clauses don't appear in the standard contracts?", "Which contract contains the weakest protections?", "List all the expiration dates".
5. Data analysis — CSV + PDF Reports
Upload a PDF report + a data sheet. Ask: "Explain this figure in the context of the report", "What are the reasons for the drop in the data in section 3?".
6. Language learning — from study materials
Upload textbooks, grammar and exercises. Ask: "Explain this rule with examples", "What is the difference between X and Y?", "Create an exercise to test my understanding".
7. Product — PRD + User Research → Insights
Upload a PRD, UX surveys, store reviews and Support Tickets. Ask: "What's the most requested feature that doesn't exist?", "What's the main reason for Churn?".
8. Health — medical research
Upload medical studies and test results. Ask: "Explain this finding in simple words", "What are the studies' recommendations for this condition?" — always with citations to the source.
9. Content writing — Research → Outline → Draft
Upload 10 articles on a topic. Ask: "Create an Outline for a blog post", "What's the most unique angle that hasn't been covered yet?", "Write an opening paragraph".
10. Team training — Company Docs → Q&A
Upload employee handbooks, procedures and policies. Every new employee can ask questions and get precise answers with citations — instead of waiting for a manager.
Tips & Best Practices
- Organize by project — a separate Notebook for each project/client/topic. This keeps the context clean and focused.
- Specific questions are better — "what does section 4.3 say?" gives much more precise results than "summarize".
- Click the citations — every answer includes citation numbers. Click them to see the original paragraph in the document.
- Follow-up — after an answer, ask "expand on the second point" or "give another example" for depth.
- Export — every answer can be copied. Long answers can be exported as Google Docs.
- Pin Sources — mark sources as Pinned so the AI gives them higher priority.
Limits worth knowing
- Only from your documents — it can't answer general questions. This is an advantage (reliability) and also a limitation.
- No memory between sessions — it remembers documents but not previous conversations.
- Multilingual — works well, not perfect — asking in English about non-English documents sometimes gives better results.
- An encrypted PDF — won't be imported. DRM and sites with a Login — also not.
4 practical projects
50 academic papers → a research summary → ready-made citations → a Briefing Doc to present.
A business book → Audio Overview → an MP3 file → sharing with the team on Slack.
Annual reports of 5 competitors → a SWOT analysis → a strategic Timeline → a Briefing.
Course materials → an automatic Study Guide → exam questions → Audio for review on the go.
Cheat sheet — everything you need to know
Source types and limits
| Source | Limit | Notes |
|---|---|---|
| 500K words | The recommended format | |
| Google Docs | 500K words | Manual Refresh for changes |
| YouTube | No length limit | Requires captions |
| Web URL | Depends on the page size | Doesn't work with a Login |
| Audio | 500K words | Automatic transcription |
Free vs Plus
| Feature | Free | Plus ($20) |
|---|---|---|
| sources per Notebook | 50 | 500 |
| Audio Overviews/day | 3 | 50 |
| Notebooks | 100 | 1,000 |
| Teams Sharing | — | Included |
| Priority Access | — | Included |
Start now
Sign in, create a new Notebook, upload a document you're working with — and ask your first question. Under 5 minutes.