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Turn any PDF into flashcards you can study offline

DeckOwl builds flashcards from your own PDFs, slides, notes or photos. Study in the browser on the free plan, or export to Anki so the cards run on your device without a connection.

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

Why studying offline matters for flashcards

Studying on a train or in a basement lecture hall often means no signal, so a flashcard app that works offline is a practical need for many students. DeckOwl is a browser-based tool, so generating cards requires a connection.

Generate cards from your own PDFs, slides, notes or photos, not generic decks.
Browser study is free, with 3 generations per month.
Plus ($39/year or $7.99/month) adds unlimited generations and Anki, PDF, DOCX and CSV export.
Students get 40% off with a school email, and no credit card is needed to start.

Example cell biology flashcards

Which organelle produces most of a cell's ATP?The mitochondrion, through cellular respiration.

What is the function of the Golgi apparatus?It modifies, sorts and packages proteins and lipids for transport within or out of the cell.

How does osmosis differ from diffusion?Osmosis is the movement of water across a semipermeable membrane, while diffusion is the movement of any solute down its concentration gradient.

Which end of a phospholipid faces the watery environment, and why?The hydrophilic phosphate head, because it interacts with water, while the hydrophobic tails face inward.

What do ribosomes do?They synthesize proteins by translating mRNA into a polypeptide chain.

Generate the full set

Built from your material

Upload a PDF, DOCX, PPTX, plain text notes or a photo of a page, and get flashcards drawn from that content.

Spaced repetition

Cards are scheduled for review so you see the ones you miss more often and the ones you know less often.

Export for offline review

On the Plus plan, export to Anki, PDF, DOCX or CSV and review on a device that has no signal.

How it works

Upload your material

Add a PDF, slide deck, text file, or image of your notes from class or a textbook chapter.

Review the generated cards

Check the flashcards DeckOwl creates and edit any that need clearer wording before you study.

Study or export

Study in the browser with spaced repetition, or export to Anki on Plus so the cards are on your device.

Once the cards exist, you can move them into an offline-capable app. The Plus plan exports to Anki, which keeps the deck on your device, so you can review it with no internet and still follow a spaced repetition schedule.

The free plan includes 3 generations per month and browser study, with no exports. If you plan to study away from the internet, generate your deck while you are online, then export it on Plus before you leave.

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Turn your notes into spaced repetition flashcards you study in any computer browser.

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Turn photos of notes into free flashcards with spaced repetition. No credit card needed.

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Frequently asked questions

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

Aim for one card per term, definition or process your instructor emphasizes, which often means 40 to 100 cards for a full unit. Start with the chapter headings and key vocabulary, then add cards for any topic you get wrong on practice tests.

How often should I review flashcards with spaced repetition?

Review new cards within a day or two of learning them, then let the intervals grow for cards you recall easily. Cards you miss should come back sooner, so the schedule adjusts to what you actually know.

Can I study DeckOwl cards without an internet connection?

Studying in the browser needs a connection. On the Plus plan you can export your deck to Anki and review it on your device without one.

Is there a free plan?

Yes, the free plan gives you 3 generations per month and browser study, with no card needed to start. Exports, including Anki, require the Plus plan.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.