It compresses.
- Feeds your 40 slides to a model and hands back a shorter version
- Bullet points, an outline, a summary that fits on one page
- You reread it, it feels familiar, you close the laptop
- The explanation you were missing is still missing
For students who do the reading
Slides aren't lessons.Lecturly makes them lessons.
Drop in a lecture PDF, PowerPoint, or Word doc. Lecturly writes the explanation your professor skipped, animates it, narrates it, and turns it into a cheat sheet, flashcards, and a quiz you can actually study from.
Free to start. No card required.
Trusted by students at:
0+ students and growing.
The lesson lives in the lecturer’s head.
Slides are notes for the person speaking. They make sense if you were there when someone explained them. If you weren’t, and most of the time you weren’t, you get a list of bullets and a vague memory of what they were about.
So the missing thing was never length. It was the explanation. Which is exactly the thing a summarizer throws away first.
It expands.
- Writes the sentences your lecturer would have said out loud
- Draws the diagram and builds it while it explains it
- Narrates it, so the picture and the words arrive together
- Then makes you retrieve it instead of reread it
Your lecture gets bigger, not smaller. That is the whole product.
Why we build it that way
None of this is our theory. It is the boring consensus of fifty years of cognitive psychology, and most study tools ship as though it does not exist.
Of ten common study techniques, only practice testing and distributed practice were rated high utility. Summarizing, highlighting, and rereading were all rated low.
Why we end at a quiz, not a summary
Dunlosky, Rawson, Marsh, Nathan & Willingham (2013), Psychological Science in the Public InterestStudents in active classrooms learned more while reporting they had learned less. The fluent feeling a tidy summary gives you is not evidence that you understood it.
Why a shorter deck is not a better deck
Deslauriers, McCarty, Miller, Callaghan & Kestin (2019), PNASAn animation with spoken narration beat the same animation without it. Words and images travel through separate channels, so using both raises how much you can absorb at once.
Why lessons are drawn and spoken, not written
Mayer & Anderson (1991), Journal of Educational PsychologyBreaking one continuous lesson into learner-paced segments improved transfer scores over the same lesson delivered in one run.
Why your deck is split into subtopics you pick from
Mayer & Chandler (2001), Journal of Educational PsychologyBeing tested on material produced better long-term retention than restudying it, even though the students predicted the opposite.
Why flashcards and quizzes ship with every lesson
Roediger & Karpicke (2006), Psychological Science
How it works
Upload your notes.
Your professor's slides, your own notes, whatever you have. PDF, PowerPoint, or Word.
Pick the subtopic.
We split the file into the topics it actually covers. Choose the one you need tonight.
Learn it.
You land in a workspace built around that one topic: the lesson, a cheat sheet, flashcards, a quiz, and a tutor that has read all of it.
Everything for one topic, in one place.
Only the lesson needs generating. The cheat sheet, flashcards, and quiz build straight from your notes, so they are there the moment you upload.
The lesson your professor didn't have time for.
One topic becomes a narrated lesson with the diagram built on screen as it is explained. Captions track the words, chapters track the argument, and you can scrub any of it.
A cheat sheet you can actually edit.
Key terms, core concepts, formulas, and the mistakes people make. Rewrite any line, then export it as Markdown, PDF, or Word.
Flashcards that track what stuck.
Every card sits in Learning, New, or Mastered, and moves as you answer. Star the hard ones, export the deck to Anki or Quizlet.
Quizzes that rewind to the source.
Four question types, graded the moment you answer. Miss one and it deep-links to the exact second of the lesson where it was taught.
A tutor that already watched it.
Pause anywhere and ask. It sees the scene on screen and the sentence you just heard, so the answer is about your lecture, not the open internet.
Send a topic to the group chat.
Every lesson has a share link. Your study group opens it and watches the same thing you did, no upload and no setup on their end.
Things people ask.
Do I need my professor's slides?
No. Whatever you have works: the lecture deck, a reading, or notes you typed yourself. Lecturly reads the text and splits it into the topics it actually covers, then you pick which one you want explained.
Do I have to generate a video to use the study tools?
No, and this is the part most people expect to be gated. The cheat sheet, flashcards, and quiz all build straight from your uploaded notes and are available the moment the file finishes parsing. Generating the lesson is optional; it just adds scene-level context, which is what lets a missed quiz question rewind to the exact second it was taught.
What counts as one lesson?
One narrated, animated lesson for one subtopic. If your deck splits into 24 topics, generating all of them is 24 lessons. Cheat sheets, flashcards, and quizzes are metered separately and never consume a lesson. Regenerating a subtopic you already generated does not cost a new one either.
What file formats work, and what breaks?
PDF, PowerPoint (.pptx), and Word (.docx), up to 50 MB. For PowerPoint we read the slide text and the speaker notes when they exist. What does not work: images of text. We do not run OCR, so a scanned reading or a deck of photographed pages will parse as nearly empty and generate badly. If your file is mostly pictures of words, expect a poor result.
How long is a lesson?
A few minutes for a typical subtopic. Lecturly sizes the lesson to how much is actually in the topic rather than padding to a target runtime, so a dense topic runs longer than a thin one.
Can I share a lesson with my study group?
Yes. Every lesson gets a share link, and anyone who opens it can watch. The link is tied to the topic rather than to a specific generation, so if you regenerate the lesson the same link serves the new version and you do not have to re-share it.
Is it free to start?
Yes, and no card is required. The free tier includes three lessons plus five each of cheat sheets, flashcard decks, and quizzes. That is enough to run a real week of one class before deciding whether it is worth paying for.
Where does my data go?
Your uploads and the generated narration audio sit in encrypted cloud storage and you can delete them from your account at any time. The AI providers we use to generate lessons do not train their models on what you upload. The specific providers and what each one receives are listed on the Privacy page.