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Let AI make flashcards from your PDFs, slides and notes

Upload a PDF, DOCX, PPTX, text file or a photo of a page. DeckOwl builds flashcards you can review with spaced repetition.

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Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

Free · First set needs no signup · Creates flashcards in seconds

How AI turns your material into flashcards

Writing flashcards by hand from a 40-page chapter can take hours, and most of that time goes to finding the terms worth memorizing. Using AI to make flashcards shifts that work to the first few minutes, so you can spend the rest of your time actually studying.

Upload PDF, DOCX, PPTX, plain text or photos of pages
Review generated cards before you study them
Spaced repetition schedules harder cards more often
Free plan includes 3 generations per month with browser study

Example Pythagorean theorem flashcards

What does the Pythagorean theorem state?In a right triangle, a² + b² = c², where c is the hypotenuse and a and b are the other two sides.

Which side of a right triangle is the hypotenuse?The longest side, which sits opposite the right angle.

Find the hypotenuse of a right triangle with legs 3 and 4.5, because 3² + 4² = 9 + 16 = 25, and the square root of 25 is 5.

Is a triangle with sides 5, 12 and 13 a right triangle?Yes, because 5² + 12² = 25 + 144 = 169 = 13², which satisfies the converse of the theorem.

What is the converse of the Pythagorean theorem?If the sides of a triangle satisfy a² + b² = c², with c the longest side, then the triangle has a right angle opposite c.

Generate the full set

Works with your own material

Upload PDFs, DOCX and PPTX files, plain notes, or photos of textbook pages. Photos are read with text recognition.

Spaced repetition built in

Cards come back to you at the intervals that help you remember them, so you spend less time rereading what you already know.

Quizzes and mind maps too

The same material can become multiple choice, true/false or short answer quizzes with explanations, or a mind map of main ideas.

How it works

Upload your material

Add a PDF, slide deck, set of notes or photos of pages. No credit card is needed to start.

Generate flashcards

DeckOwl reads the text and proposes question and answer cards from the key terms and facts.

Study in the browser

Review cards right away. Free accounts study in the browser, and Plus adds PDF, DOCX, Anki and CSV export.

The tool reads the text of your file, picks out definitions, formulas and cause-and-effect facts, and writes each one as a question on the front and an answer on the back. You can review the set, delete cards you do not need and study again as you go.

Spaced repetition then schedules each card based on whether you recalled it, so harder cards show up more often. Students who prefer quizzes can turn the same notes into practice questions with explanations.

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Frequently asked questions

How many flashcards should I make for the Pythagorean theorem?

A focused set of 8 to 15 cards is usually enough to cover the theorem, its converse, the names of the sides and a few worked examples. Add more only when you notice a specific gap.

What is the best way to study a theorem like the Pythagorean theorem with flashcards?

Put the statement on one card and a worked numeric example on another, then practice both directions: find the hypotenuse and check whether three sides form a right triangle. Spaced repetition helps you keep the formula after the first week.

Can I export my flashcards to Anki?

Yes, but export is a paid feature. Plus ($39/year or $7.99/month) includes PDF, DOCX, Anki and CSV export, while the free plan lets you study in the browser.

Is there a free plan?

Yes. The free plan includes 3 generations per month and browser study, and you can start without a credit card. Students can get 40% off a paid plan with a school email.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.