Transform PDFs Into Immersive Video Lectures
Stop re-reading. Start understanding. Get instant clarity on research papers, textbooks, and reports with immersive video lectures and page-by-page insights.

Immersive Video Lectures That Actually Teach
Unlike 20-minute summaries of entire books, you get 20-60 minutes of real teaching for every 20 pages. It's like having a professor personally guide you through the material.
Narrated Audio
Professional lecture narration that explains concepts clearly
Dynamic Blackboard
Visual notes appear in real-time alongside your reading
Auto-Scrolling Pages
Your PDF follows along automatically as the lecture progresses
Smart Highlighting
Key passages light up exactly when they're being discussed
Depth Over Gimmicks
We limit lectures to 20 pages maximum, ensuring you get 20-60 minutes of genuine, in-depth teaching—not a rushed summary. Every concept gets the time it deserves.
Reading Tools That Actually Help You Understand
Beyond lectures, OtterNote provides reading tools that actually help you understand—like having a smart friend who's always on the same page.
Between The Lines
See what matters on every page before you even read it
Like having expert annotations in the margins for every page and document. AI insights appear right next to the passages they explain. Hover over any annotation to see the exact text it's referencing.
AI That Knows Where You Are
Ask questions about what you're reading right now, not the whole document
Unlike ChatGPT or NotebookLM that search your entire PDF, OtterNote knows exactly what page you're on. Highlight any confusing text and get help that's actually about what you're reading.
Turn Messy Notes Into Clean Text
Snap a photo of your handwritten equations and get perfect LaTeX
No more retyping math homework or lecture notes. Take a picture of your handwritten work and instantly get clean, searchable text, even for complex formulas.
Notes That Stay Where You Put Them
Your thoughts stick to the exact page where you had them
Write notes that automatically attach to the page you're reading. When you come back weeks later, your insights are right there waiting, no searching required.
How It Works
Get started with OtterNote in minutes and transform your reading experience
Drag & drop PDF files here
Max size: 25 MB · PDF files only
Upload Your Documents
Simply drag and drop your PDFs or browse to upload any document you want to read deeply
Entanglement
Key Concept:
- • EPR paradox
Formula:
|ψ⟩ = α|0⟩ + β|1⟩
Read or Listen
Open any document and choose to read with Between The Lines insights or generate an Immersive Video Lecture
Explore & Understand
Highlight any text to ask questions, or chat with AI that knows your reading context
Frequently Asked Questions
Everything you need to know about OtterNote
Simple Pricing
Start for free and upgrade as you need more powerful features
Free
Perfect for trying out OtterNote
- 2 Video Lectures per month
- 20 Between the Lines per month
- 50 MB total upload per month
- Up to 10 MB PDF size
- PDFs up to 25 pages
- 100 AI chat queries per month
Pro
For serious readers and researchers
- 50 Video Lectures per month
- Unlimited Between the Lines per month
- 1 GB total upload per month
- Up to 50 MB PDF size
- PDFs up to 1000 pages
- Unlimited AI chat queries
All plans include access to core features like page-anchored notes and handwriting to LaTeX
USD prices are approximate conversions for reference. Billing is in CAD.
Ready to Read Smarter?
Try Immersive Video Lectures and see why students are finally understanding their textbooks, not just reading them.