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Study flashcard decks online, built from your own PDFs and notes

Upload a PDF, slides, notes or a photo of a page and get flashcards with spaced repetition. Study in the browser, no desktop install needed.

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 · First set needs no signup · Creates flashcards in seconds

How an online deck viewer fits into studying

Reviewing cards without installing desktop software is the main reason people look for an online Anki deck viewer. DeckOwl takes a different route: it builds a new deck from the material you upload, so the cards match your own course readings and lecture slides.

Start with one chapter or lecture rather than a whole textbook, so each deck stays easy to review.
Write answers in your own words after generating, since rewording a card is a quick way to test real recall.
Review a short session every day instead of one long session before the exam.
Check that each card has one fact, so a missed card tells you exactly what to revisit.

Example intro biology flashcards (sample topic)

What does the cell membrane do?It controls what enters and leaves the cell, acting as a selectively permeable phospholipid bilayer.

What is the difference between mitosis and meiosis?Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically distinct haploid gametes.

Which molecule carries amino acids to the ribosome during translation?Transfer RNA (tRNA), whose anticodon pairs with the matching mRNA codon.

What is the role of ATP in cells?It is the main energy currency, since breaking its terminal phosphate bond releases energy for cellular work.

What is the Hardy-Weinberg equilibrium used for?It predicts allele and genotype frequencies in a population that is not evolving, which gives a baseline for comparison.

Generate the full set

Browser study

Review your cards in any modern browser on a laptop, tablet or phone. Nothing to install before you start.

Spaced repetition

Cards you miss come back sooner, and cards you know are spaced further apart, so review time goes where it helps most.

Anki export on Plus

Plus exports your decks to Anki, along with PDF, DOCX and CSV, so you can keep studying in the app you already use.

How it works

Upload your material

Add a PDF, DOCX, PPTX, plain text notes or photos of pages. Images are read with text recognition.

Generate your deck

DeckOwl turns the material into flashcards, and you can also create quizzes and mind maps from the same source.

Study in your browser

Open the deck and review it online. Upgrade to Plus when you want to export it to Anki.

Every deck can be studied directly in the browser on the free plan. Spaced repetition schedules reviews based on how well you recall each card, which keeps sessions short and focused.

If you later need the deck in Anki, Plus exports it as an Anki file at $39/year or $7.99/month, and students get 40% off with a school email.

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Frequently asked questions

How many flashcards should I make for an introductory biology unit?

A single unit usually works well with 40 to 80 cards, split by topic such as cell structure, genetics and metabolism. Smaller decks are easier to review daily and keep the spaced repetition schedule accurate.

How often should I review flashcards?

Short daily sessions of 10 to 20 minutes work better than long weekly sessions for most subjects. Spaced repetition adjusts the timing for you, so cards you find hard appear more often.

Can I export my flashcards to Anki?

Yes, but exports are a paid feature. Plus ($39/year or $7.99/month) includes Anki export, and the free plan lets you study decks in the browser without exporting.

Is there a free plan, and do I need a credit card?

The free plan includes 3 generations per month and browser study. You do not need a credit card to start.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.