Free PDF to flashcards converter Turn any PDF into flashcards
Upload lecture slides, notes or a textbook chapter as a PDF. Get 16 study-ready flashcards from what's actually in it. Free, no sign up.
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Drop in a PDF and lezrn reads the text, picks out the ideas that matter and writes 16 flashcards from them. The file is read right in your browser, and the AI is told to stick to what your PDF says.
How to turn a PDF into flashcards
Upload your PDF
Click Upload file or drop the PDF onto the box. It needs selectable text, so exported slides, typed notes and digital textbooks all work. Word, TXT and Markdown files work too.
Make the deck
Hit Make my flashcards. The AI reads the text of your PDF and writes 16 cards on its most important points, from the basics up.
Flip through it
Click a card to flip it and step through the deck. Answer each one in your head before you look.
Example: flashcards from Article I of the US Constitution
The kind of cards a public domain PDF turns into. Your deck has 16, made from your own file.
- How old must a member of the House of Representatives be?
- At least 25. They must also have been a US citizen for 7 years and live in the state they represent.
- How long is a senator's term?
- Six years. A representative's term is two years.
- Who has the sole power of impeachment?
- The House of Representatives. The Senate holds the trial.
- How can Congress override a presidential veto?
- With a two-thirds vote in both the House and the Senate.
- Which branch has the power to declare war?
- Congress, under Article I, Section 8.
Best PDFs to use
Lecture slides
Export your slides to PDF and upload them. Slides are light on words, so a whole lecture often fits in one run.
A textbook chapter
Save the pages you were assigned as their own PDF. One focused chunk per deck keeps the cards on point.
Study guides and handouts
Review sheets from your teacher are already full of what's on the test. They make great decks.
Scanned PDFs and long textbooks
The tool reads the text layer of a PDF. If you can highlight words in your PDF viewer, it will work. A scanned page or a photo of a page is just an image with no text to read, so you'll get an error instead of cards.
Long files open fine, but each run uses about the first 15,000 characters, roughly 2,500 words. For a big textbook, save the chapter you're studying as its own PDF (most PDF viewers can print or export a page range) and upload that.
Why flashcards beat rereading your PDF
Reading a PDF again feels like studying, but mostly your brain is just recognizing the text. A flashcard makes you pull the answer from memory, and that effort is what builds recall. Making cards by hand works too. It just takes a while, and that's the part this skips.
To keep what you learn, go through the cards again over the next days and weeks. The full lezrn app does that part for you: it turns your PDF into a course and schedules each concept for review right before you'd forget it.
Frequently asked questions
Is there a free AI that makes flashcards from a PDF?
Yes, this one. Upload a PDF and get 16 flashcards. As a guest you get 3 free generations a day, with no account and no card.
How do I make flashcards from a PDF?
Upload the PDF here, hit Make my flashcards, and study the deck on the page. The AI writes the cards from the text in your file.
Does it work with scanned PDFs?
No. It needs selectable text. If you can't highlight words in the PDF, it's a scan, and the tool can't read it.
How long can my PDF be?
Any length opens, but each run uses about the first 15,000 characters, around 2,500 words. Split long books into chapters and do one at a time.
Do you keep my PDF?
No. The file is read in your browser and only its text is sent to the AI to make the cards. The file itself is never uploaded.
Can I use PowerPoint slides?
Save or export them as a PDF first, then upload that. PowerPoint files themselves aren't supported.
Can ChatGPT make flashcards from a PDF?
It can if you upload the file and ask. The difference here is that there's no prompt to write, and you get a deck you can flip through right away instead of a list in a chat.