01
Between the Lines
Like expert annotations in the margins. Insights appear beside dense passages, clarifying them before you have to ask.
OtterNoteTransform PDFs Into
Immersive Lectures
Used by students and researchers at
- University of Toronto
- University of Waterloo
- York University
- Harvard University
- Columbia University
- Cornell University
- Duke University
- University of Michigan
New · Immersive video lectures
Video Lectures
That Actually Teach.
Unlike 20-minute summaries of entire books, OtterNote generates 20 to 60 minutes of real teaching for every 20 pages. It is like having a professor guide you through the material, explaining concepts as they appear in the text.
- Narrated audio
- Clear, patient explanations at your pace.
- Dynamic blackboard
- Key terms and equations drawn as they are taught.
- Page kept in sync
- The PDF scrolls with the lecture.
- Smart highlights
- The passage being explained is always marked.
Time spent on 20 pages
Depth over gimmicks
Standard summary5 min
OtterNote lecture45 min
A summary tells you what a chapter says. A lecture teaches you why it matters.
Reading Tools That Actually Help
Beyond lectures, OtterNote is a study partner that is always on the same page as you.
02
Page-aware chat
Don't search the whole book. Ask about the page you are reading right now.
03
Image to LaTeX
Snap a photo of handwritten equations and get clean, searchable LaTeX.
04
Sticky notes
Thoughts stay on the exact page where you had them. Review them in context, where they belong.
How It Works
From PDF to comprehension in three steps.
Drag & drop PDF files here
Max size: 25 MB · PDF files only
Ready to upload
01
Upload a document
Drag and drop your PDFs. OtterNote takes huge documents without complaint.
Lecture: Quantum Mechanics
Page 12/4523:45
Source Text
Entanglement
KEYEPR Paradox
Wave Function:
|ψ⟩ = α|0⟩ + β|1⟩
Live Sync
1.5x Speed
20-60 min
02
Generate a lecture
Choose a chapter or page range and get a synchronized video lecture.
AI Chat
Page 1
What is quantum entanglement?
Based on the definition on page 1, quantum entanglement is when particles become connected...
Ask about this page...
03
Read with company
Ask questions about the page in front of you and take notes that stay with the text.
Frequently Asked Questions
While NotebookLM creates 20-minute podcasts for entire books (making them essentially summaries), our Immersive Lectures provide 20-60 minutes of in-depth coverage for just 20 pages. You get a real lecture experience with synchronized page scrolling, text highlighting, and a dynamic blackboard - actually helping you understand the material, not just skim it.
OtterNote isn't just a PDF reader or summarizer - it's a reading companion that reads WITH you. Our Between The Lines feature, reading-aware AI chat, and new Immersive Video Lectures understand exactly what you're reading and where you are in the document, providing deeper insights as you go.
Other PDF chat-bots like Notebook LM do a search over the entire document on every question you ask. They are used to find quick answers and summarize large texts. OtterNote on the other hand knows what page you are currently reading and it reads with you. With OtterNote you're not searching for answers, you're reading deeply and you have a companion to help you understand what you are reading.
Yes! While OtterNote is optimized for dense material like textbooks, academic papers, and research documents, it works equally well with novels, articles, reports, and any other PDF content.
Absolutely. We take privacy seriously. Your documents and reading data are encrypted and never shared with third parties. You have full control over your content.
The Free plan includes 2 Immersive Lectures a month. Plus is $11 USD/month ($9/month billed annually) with 5 lectures, unlimited AI chat, unlimited Between The Lines, and PDFs of up to 1000 pages. Pro is $20 USD/month ($16/month billed annually) and raises that to 50 lectures a month. Canadian pricing is available on the pricing page.
Ready to Master Your Reading?
Join the students and researchers using OtterNote to finally understand their material.