Lecture Summarizer
Upload a lecture recording or paste a link and turn an hour of class into study notes – key concepts, definitions, and takeaways – in minutes.
Accepts a lecture recording – MP3, M4A, WAV, MP4 and more – or a link · returns study notes with key concepts, plus the full timestamped transcript.
60 min free · no card required · we never train on your audio
How do I summarize a lecture recording?
Pepys summarizes lectures with AI: upload a recording or paste a link and get study notes – key concepts, definitions, and takeaways – in minutes, grounded in a full, timestamped transcript, in 99+ languages. Turn an hour of class into a one-page review. Your first 60 minutes are free, no card.
How lecture summarizer works
Upload the lecture or paste a link
Drop in your recorded class or paste a link – any format, any language, no length limit.
Get your study notes
AI transcribes the lecture, then writes a summary with the key concepts, definitions, and takeaways in minutes.
Review and export
Ask the lecture questions in chat, jump to any point in the transcript, then export your notes to TXT, Markdown, DOCX, or PDF.
Re-watching a recorded lecture to revise is slow, and your handwritten notes always miss the bit you needed. Pepys does the review pass for you: upload the recording or paste a link and get study notes that lay out the key concepts, the definitions, and the takeaways – so an hour of class becomes a page you can actually study from.
The notes are grounded in a full, timestamped transcript, so when a concept doesn't click you can jump straight back to the moment the lecturer explained it. It works across 99+ languages, you can quiz the lecture in built-in chat, and we never train on your audio. Pay only for the minutes you transcribe; credits never expire.
Clean paragraphs. No more um's and ah's.
The left is what Pepys hands back – logical paragraphs with the filler stripped out, punctuated and readable. The right is the raw, one-line-per-segment dump most transcribers leave you with.
um so yeah everyone keeps telling you to like lead with your best line right but uh honestly if you give away the whole answer in the first second you know there's basically no reason for anyone to keep watching so the hook isn't kind of the smartest thing you say it's like a loop you open that they need to close and um that's the part that actually keeps people around
RawStudy notes with key concepts and definitions – not a raw wall of transcript
Every note links back to the timestamped moment it was taught
Ask the lecture questions in built-in chat – like a tutor on the recording
99+ languages, auto-detected · we never train on your audio · credits never expire
Works with the platforms you live in.
Paste a link from YouTube, TikTok, Instagram, Facebook, Spotify, or Apple Podcasts – or drop in any audio or video file. We transcribe it once, then you export it however your workflow needs.
- YouTube
- TikTok
- Spotify
- Apple Podcasts
- or any file
Export to any format
- TXT
- Markdown
- DOCX
- SRT
- VTT
- JSON
Timestamps, speaker labels, and subtitle timing carry through to every export.
Lecture summarizer – questions, answered
How do I summarize a lecture recording?
Upload the lecture file or paste a link on this page. Pepys transcribes it and writes study notes with the key concepts in minutes. Your first 60 minutes are free, no card required.
Can I ask the lecture questions afterward?
Yes. Built-in chat lets you ask follow-up questions and it answers from the transcript – so you can quiz the recording instead of re-watching it.
How long can the lecture be?
There's no length limit – summarize a 20-minute talk or a three-hour seminar. Long recordings are chunked and stitched automatically, using more of your free minutes or credits, which never expire.
Does it handle lectures in other languages?
Yes – language is auto-detected across 99+ languages, and you can translate the finished notes and transcript into another language.
Do you train on my recordings?
Never. We don't train AI on your audio, transcripts, or notes, and you can auto-delete your files after processing.
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Lecture summarizer – free to start
Pay as you go – credits never expire, nothing to cancel. Or start free with 60 minutes, no card.