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Turn your notes into double-sided flashcards

Upload a PDF, slide deck, set of notes or a photo of a page. DeckOwl builds cards with a prompt on one side and the answer on the other, then schedules reviews 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

Why double-sided cards work for studying

A printed card with a term on one side and its definition on the other is still one of the simplest study tools, and a double-sided flashcard maker lets you build that set from your own reading in minutes.

Put one fact or question on each front so recall stays focused.
Keep answers short enough to check in a glance.
Review missed cards more often than the ones you already know.
Rebuild the set from new lecture slides each week to keep it current.

Example biology flashcards (cell structure)

Which organelle produces most of a cell's ATP?The mitochondrion, through cellular respiration. Its inner membrane hosts the electron transport chain that makes most ATP.

What is the function of the nucleolus?It assembles ribosomal subunits from rRNA and proteins.

Which molecule brings amino acids to the ribosome during translation?Transfer RNA (tRNA), which matches its anticodon to the mRNA codon.

What is the main difference between prokaryotic and eukaryotic cells?Eukaryotic cells have a membrane-bound nucleus and other membrane-bound organelles. Prokaryotes lack both.

What does the Golgi apparatus do?It modifies, sorts and packages proteins and lipids for transport to their destinations.

Generate the full set

Question front, answer back

Each card puts a term or prompt on the front and the answer on the back, so you can test yourself in one flip.

Built from your own material

Cards come from the PDFs, DOCX and PPTX files, plain notes, or images you upload, not from a generic deck.

Spaced repetition included

Cards you miss come back sooner and cards you know come back later, so review time goes to what you are forgetting.

How it works

Upload your material

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

Generate double-sided cards

DeckOwl writes a front and back for each key idea. Edit anything that does not match your course.

Study in the browser

Review cards on any device. The free plan includes 3 generations per month with no credit card needed to start.

Keep each side to one idea. A front that asks one specific question and a back that gives one short answer makes it easier to recall without peeking, and it shows quickly which facts still need work.

Because the cards come from your own notes and slides, the set matches what your instructor tests. You can read the back, say the answer aloud, then flip to check.

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Frequently asked questions

How many double-sided flashcards should I make for one topic?

Most topics work well with 20 to 40 cards, one per key term or idea. Start with the headings and definitions in your notes, then add cards for anything you keep missing.

What belongs on the back of a study flashcard?

The back should hold the shortest complete answer, such as a definition, a formula result, or a one-line explanation. Adding a brief reason helps you remember why the answer is true.

Can I export double-sided flashcards to Anki or CSV?

Yes, but exports are a paid feature. The Plus plan at $39/year or $7.99/month includes PDF, DOCX, Anki and CSV export along with unlimited generations.

Is there a free version I can try first?

Yes. The free plan includes 3 generations per month and lets you study cards in the browser, and no credit card is needed to start.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.