AI Lecture Summarizer
Paste a lecture link or upload the recording and get study notes back — key points, timestamped chapters and the full transcript, ready to revise from. Free, no sign-up to start.
- Free to try — no sign-up needed
- Summaries in 14 languages
- Summary, transcript, mind map & Q&A
Try it on a popular video
No link handy? Jump straight into one of these.
But What Is a Neural Network?
3Blue1Brown's classic visual intro to deep learning.
Inside the Mind of a Master Procrastinator
Tim Urban's TED talk on why we procrastinate.
Steve Jobs' Stanford Commencement Address
The 2005 speech on life, death, and following your passion.
How Great Leaders Inspire Action
Simon Sinek's TED talk on the Golden Circle.
What You Get Back From a Ninety-Minute Lecture
A lecture is the worst possible format for revision. The information is linear, unsearchable, and locked to the speed someone chose to talk at. What you actually need afterwards is the same content rearranged so you can find one thing in it — which is what this produces, in a single document, in about the time it takes to make coffee.
- Summary — one paragraph telling you what the lecture argued, so you can decide what to reread.
- Key points — numbered, each with a heading and a line of detail. This is the part you revise from.
- Chapters — the lecture split into sections, each bullet stamped with the second it was said.
- Full transcript — every word, timestamped, underneath. Nothing is thrown away.
- Your own notes — a writing field per lecture, saved to your account, for the part that only makes sense to you.
Length is the whole argument. A free account reads lectures up to an hour; Pro goes to six, which covers a double session, a recorded seminar or a conference day. And if what you have is a file rather than a link — a Zoom recording, a Panopto download, an audio capture from your own phone — the upload page takes it and produces the same document.
Notes are stored per lecture and per interface language. An English lecture can produce notes in any of the 14 output languages, so the language you study in does not have to be the language it was taught in.
A lecture summarizer AI is only useful if it can handle an actual lecture. Most tools cap out after fifteen minutes, which is roughly the point where a lecture starts saying anything. This one reads recordings up to six hours and hands back one document: a summary at the top, numbered key points under it, the lecture split into chapters with the timestamp of every point, and the complete transcript at the bottom. Every timestamp is a link back to that second, so when a line in your notes stops making sense you can hear it said again.
From a Lecture to Study Notes in Three Steps
About a minute for a long recording. Short lectures on YouTube work without an account.
Paste the link, or upload the recording
A public YouTube, TikTok, Instagram or X link works directly. A Zoom, Panopto or phone recording goes through the upload page — video or audio, either is fine.
Read the summary, then the chapters
Start with the one-paragraph summary to see what was argued. Drop into the chapters for the parts you need, and click any timestamp to hear that exact line again.
Write your own lines, then export
Add what the lecture made you think, then send the whole thing to Obsidian or Notion, or download Markdown. Exporting needs a free account.
When You Need a Lecture Summarized
All of these have the same shape: you will need this content again, and "it was somewhere in week six" is not a way to find it.
The lecture you missed
Recorded lectures are usually posted but rarely watched — ninety minutes is a lot to ask of someone who is already behind. A summary with chapters gets you the argument in five minutes and shows you exactly which ten you actually have to watch.
Revision, weeks later
By exam season the lectures have blurred together. Notes where every claim links back to the moment it was made are the difference between revising and rewatching — you check the one line you are unsure about, not the whole session.
Recordings you made yourself
A phone recording of a seminar, a Zoom call, a field interview. Upload the file and it gets the same treatment as a link: transcript, summary, chapters, timestamps. A free account includes 20 minutes a month of upload, Pro includes 300.
A whole course, not one session
Save a term's lectures into a collection and it becomes an ordered learning path with progress tracking and a quiz at each step, so a folder of recordings turns into something you can work through and check yourself on.
Teaching material you are reviewing
If you are the one lecturing, a transcript with chapters is the fastest way to see what you actually covered, how long you spent on it, and what to cut next time.
Built for Lectures, Not Clips
The difference between a summarizer and a study tool is what happens after the summary.
Chapters with timestamps that survive export
A ninety-minute lecture comes back split into sections, each bullet carrying the second it was spoken and written as a deep link into the recording. They still work after the note lands in Markdown, Obsidian or Notion — which is the only reason timestamps are worth keeping.
Summarize a lecture freeSix hours, not fifteen minutes
Without an account you get short videos; a free sign-in raises the cap to an hour, and Pro reads recordings up to six. Most lectures do not fit in the free tiers of tools built for clips — that is the gap this exists to close.
Summarize a lecture freeA mind map, and answers you can keep
The same lecture also renders as a mind map when you want the structure of the argument rather than the order it was delivered in. Ask it anything and the answer is grounded in the transcript — questions and answers are saved with the lecture and exported alongside the notes.
Summarize a lecture freeObsidian, Notion or Markdown
Send the notes to Notion in one click, write them straight into your Obsidian vault with the plugin, or download plain Markdown for any other app. A term of lectures belongs in your own system, not in someone else's web page.
Summarize a lecture free