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Test yourself on any PDF or slide deck with AI flashcards

Upload your lecture slides, textbook chapters, notes or photos of pages. DeckOwl builds flashcards from them and schedules reviews so you spend time on the cards you miss.

Create flashcards nowFree · No credit card required

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

Free account · 3 sets a month · Creates flashcards in seconds

How an AI flashcard tester helps you remember

The most useful AI flashcard tester is one that quizzes you on the material you actually have to learn, not on general questions. Upload a lecture deck or a chapter and the flashcards follow its terms, definitions and processes.

Works with PDFs, slides, Word files, plain notes and photos of pages
Cards are scheduled with spaced repetition so reviews focus on weak spots
Start on the free plan with no credit card needed
Students get 40% off with a school email

Example cell biology flashcards

What organelle produces most of a cell's ATP?The mitochondrion, because oxidative phosphorylation in its inner membrane generates most of the cell's ATP.

What is the structure of the cell membrane?A phospholipid bilayer with hydrophilic heads facing the water and hydrophobic tails facing inward, which makes it a selectively permeable barrier.

What is osmosis?The net movement of water across a semipermeable membrane from the side with lower solute concentration to the side with higher solute concentration.

What is the role of ribosomes?They translate messenger RNA into polypeptide chains, which is the step where proteins are built.

Which phase of mitosis lines chromosomes up at the cell's equator?Metaphase, because spindle fibers attach to the kinetochores of sister chromatids and align them along the metaphase plate.

Generate the full set

Built from your material

Flashcards come from the files you upload, so the questions match your course rather than a generic topic list.

Spaced repetition

Cards you answer well appear less often, and cards you miss come back sooner, so each session focuses on what you still need to learn.

Quizzes and mind maps too

If flashcards are not enough, the same material can become multiple choice, true or false, or short answer quizzes with explanations, plus mind maps.

How it works

Upload your material

Add a PDF, DOCX, PPTX, plain text file or a photo of a page. Photos are read with text recognition.

Generate your flashcards

DeckOwl turns the content into flashcards with a question on the front and the answer on the back.

Test yourself on a schedule

Work through the day's review, mark what you knew, and let spaced repetition set the next review for each card.

Testing yourself is what makes recall stick. Each card asks you to produce the answer before you see it, and spaced repetition brings missed cards back at shorter intervals while letting well-known ones wait longer.

The free plan includes 3 generations per month and studying in the browser. Plus adds unlimited generations and exports to PDF, DOCX, Anki and CSV for studying outside the site.

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Frequently asked questions

How many flashcards should I make for a cell biology chapter?

Aim for one card per term, process or distinction, and split long answers into two cards. Shorter cards that test one idea are easier to recall than crowded ones.

What is the best way to review flashcards for memorization?

Try to answer each card out loud before flipping it, and spread your reviews over several days instead of cramming. Cards you miss should come back sooner than cards you know well.

Which file types can I upload to DeckOwl?

You can upload PDF, DOCX and PPTX files, plain text notes, and images of pages, which are read with text recognition. The free plan includes 3 generations per month.

Can I export my flashcards?

Exports to PDF, DOCX, Anki and CSV are included in Plus, which costs $99.90/year or $9.99/month. Students get 40% off with a school email, and no credit card is needed to start.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.