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Top up your flashcards online from the notes you already have

Upload the slides, notes or PDF you studied this week and get new flashcards with spaced repetition, ready to review in your browser.

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When your deck runs thin before an exam

When a unit ends and your deck feels thin, you can top up flashcards online by uploading the new material instead of writing every card by hand. The process starts with the source you already have, whether that is a PDF from your instructor or a photo of a page from your notebook.

  • Upload PDFs, slides, notes or images and get new cards from each one.
  • Keep existing decks and add only the cards you are missing.
  • Review new cards with spaced repetition alongside your current schedule.
  • Export to Anki, PDF, DOCX or CSV on the Plus plan.
Example fractions and decimals flashcards
What decimal equals 3/4?0.75, because 3 divided by 4 is 0.75.
Convert 0.2 to a fraction in lowest terms.1/5, since 0.2 is 2 tenths and 2/10 reduces to 1/5.
How do you add 1/3 and 1/6?Rewrite with a common denominator: 2/6 + 1/6 = 3/6, which reduces to 1/2.
What is 0.45 written as a fraction?45/100, which reduces to 9/20.
What is 2.5 multiplied by 4?10, because 25 times 4 is 100 and the decimal point moves two places left.
Generate the full set

Works with your material

Upload PDFs, DOCX files, PPTX slides, plain text notes or photos of pages. Images are read with text recognition.

Spaced repetition built in

Cards resurface at the intervals that help you remember them, so new cards slot into your review schedule without extra planning.

Study in the browser

Review new cards on any device with a browser. The free plan includes 3 generations per month, and no credit card is needed to start.

How it works

Upload the new material

Add the chapter, lecture slides or photos of your handwritten notes that your current deck does not cover yet.

Generate and check the cards

DeckOwl creates flashcards from the text. Skim them, remove any you do not need and keep the ones that match your course.

Add them to your review

Study the new cards alongside your existing ones with spaced repetition, so the gaps in your deck fill in over time.

Good top-up cards test one idea each. A card asking for the decimal form of 3/4 is easier to review than one that copies a whole paragraph. Paid plans can export the cards to Anki or CSV if you want them in another app, and the free plan keeps everything in the browser.

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Frequently asked questions

How many flashcards should I make for a fractions and decimals unit?

Focus on one skill per card, such as converting a fraction to a decimal, rather than copying whole pages. Let the number follow from how many separate skills your unit teaches.

What is the best way to study converting fractions to decimals?

Divide the numerator by the denominator, then check by multiplying back. Drill common conversions like 1/4, 1/2 and 3/4 until you can recall them without working them out.

Can I export the new flashcards to Anki?

Yes, on the Plus plan you can export to Anki, PDF, DOCX and CSV. The free plan lets you study in the browser but does not include exports.

Is there a free plan?

Yes. The free plan includes 3 generations per month and browser study. No credit card is needed to start.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.