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Turn any PDF into flashcards with AI for free

Upload a PDF, slides, notes or a photo of a page and get flashcards you can study in your browser with spaced repetition.

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

Getting from a PDF to flashcards without retyping

Most students who go looking for a free PDF to flashcards app are holding a chapter they have already highlighted and want to turn it into something they can review in short sessions. DeckOwl reads your own file and writes the question-and-answer cards for you, so you are not copying terms by hand.

Upload a PDF, DOCX, PPTX, text file or photo of a page
Get flashcards with spaced repetition scheduling
Free plan: 3 generations per month, study in the browser
Plus adds unlimited generations and exports to PDF, DOCX, Anki and CSV

Example ecosystems and food webs flashcards

What is a trophic level?The position an organism occupies in a food chain, such as producer, primary consumer, or top predator.

Why do energy pyramids usually show only about 10% passed to the next level?Most energy is used for metabolism and lost as heat, so only around 10% is stored as biomass the next level can eat.

What is the difference between a food chain and a food web?A food chain is one linear path of energy transfer, while a food web links many chains because most organisms eat more than one food.

What do decomposers do in an ecosystem?They break down dead matter and waste, returning nutrients such as nitrogen and carbon to soil and water for producers to use.

What is a keystone species?A species whose removal causes large changes to the community out of proportion to its abundance, such as sea otters in kelp forests.

Generate the full set

Works with your own files

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

Spaced repetition built in

Cards come back at the intervals that help you remember, so you spend less time rereading and more time recalling.

Quizzes and mind maps too

Turn the same material into multiple choice, true/false and short answer quizzes with explanations, or into a mind map.

How it works

Upload your material

Drop in a PDF, slide deck, document or photo of your notes. No credit card is needed to start.

Review the generated cards

Check the flashcards the AI made and edit any that are unclear or missing a key term.

Study in the browser

Work through the cards in daily sessions. The free plan lets you study in the browser at no cost.

The free plan includes 3 generations per month and studying in the browser. Exporting your cards to PDF, DOCX, Anki or CSV is part of Plus, so if you plan to study in another app, check that before you rely on the free plan.

Because the cards come from your own material, they match the course you are taking rather than a generic deck. You can review a chapter one night, then generate cards from the next lecture slides the following week.

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Frequently asked questions

How many flashcards should I make from one ecosystems chapter?

Aim for one card per distinct term or relationship, such as trophic level, producer, or energy pyramid. A typical chapter usually supports a few dozen cards, and cutting anything that repeats another card keeps reviews manageable.

How do I study food web vocabulary with flashcards?

Put the term on the front and a one-sentence definition with an example on the back, such as naming what a predator eats. Review the cards you miss more often, and try to say the answer aloud before you flip the card.

Is the free plan really free?

Yes, the free plan includes 3 generations per month and studying in the browser, with no credit card needed to start. Exports are part of the paid plans.

Can I export my flashcards to Anki?

Anki export is included in Plus, which costs $39/year or $7.99/month. Students get 40% off with a school email.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.