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Study code faster with AI flashcards from your own notes

Upload lecture slides, PDFs, notes or photos of a whiteboard and get flashcards you can review with spaced repetition. It's built for studying programming concepts, not for handing you app source code.

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

What DeckOwl does with programming material

Building a flashcard app and learning the code behind one are different projects, and DeckOwl only helps with the second. It won't write flashcard app code for you, but it turns your programming lecture notes, slides or PDFs into flashcards with spaced repetition.

Flashcards built from your lecture slides, notes and PDFs
Spaced repetition that brings back the cards you miss
Quizzes with explanations for multiple choice, true/false and short answer
Free to start with 3 generations per month and no credit card needed

Example JavaScript and SQL flashcards for learning code

What is the difference between == and === in JavaScript?=== compares value and type with no conversion, while == converts types before comparing. Strict comparison avoids surprises like 0 == '' evaluating to true.

What does a closure capture in JavaScript?Variables from its enclosing scope, by reference. This lets an inner function keep using those variables after the outer function has returned.

What does Big O notation describe for an algorithm?How runtime or memory grows as the input size grows. It describes the growth trend rather than the exact running time.

In Python, how do a list and a tuple differ?Lists are mutable and tuples are immutable. Because tuples cannot change, they can be used as dictionary keys.

What does a SQL PRIMARY KEY constraint guarantee?Each row has a unique, non-null identifier. It stops duplicate or missing keys from entering the table.

Generate the full set

From your own material

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

Spaced repetition

Flashcards come back at the intervals your memory needs, so syntax rules and algorithms stick instead of fading.

Quizzes and mind maps too

Check yourself with multiple choice, true/false and short answer questions that include explanations, or map how concepts connect.

How it works

Upload your course material

Add the slides, notes or PDF from your programming class. Plain text works if you paste code examples and definitions.

Generate flashcards

DeckOwl turns the material into question and answer cards. Review them and remove any that don't match your course.

Study on a schedule

Review the cards in the browser. Missed cards return sooner, so weak spots get more practice.

Most programming exams test definitions, syntax differences and why a piece of code behaves the way it does. Cards built from your own course material let you drill those specifics, such as how a closure keeps variables alive or why a SQL key must be unique.

Quizzes with explanations help when you get an answer wrong, since the explanation shows the reasoning rather than only the correct option. Mind maps help you see how topics like data structures and algorithms connect before an exam.

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AI Flashcard Maker for Any Study Material

Turn PDFs, slides, notes and photos into spaced repetition flashcards. Free to start.

AI Flashcard Study App

Turn your PDFs, slides and notes into flashcards with spaced repetition.

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Turn your own notes and PDFs into spaced repetition flashcards with AI.

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Turn PDFs, slides and notes into spaced repetition flashcards with AI.

Alphabet flashcards from your own sheets

Build a custom alphabet flashcard set from a photo or PDF of your letter lessons.

Frequently asked questions

Does DeckOwl generate source code for a flashcard app?

No. It creates study flashcards from your own material, not code for building an app. The tool is for learning programming concepts and recalling them for exams.

How many flashcards should I make for a programming topic?

Start with one card per term, rule or syntax pattern from a single lecture. Then add cards for the mistakes you keep making, since those are the ones worth drilling.

Can I export programming flashcards to Anki?

Yes, but export is a paid feature. The Plus plan includes Anki, PDF, DOCX and CSV export, while the free plan lets you study in the browser only.

Can it read code shown in slide screenshots?

Yes. Photos of pages and images are read with text recognition, so code in a screenshot can become flashcard material. Check the generated cards for accuracy before you study.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.