AI Learning · 3 MIN READ
How to Make Flashcards from a PDF or YouTube Video in Minutes
Stop typing flashcards by hand. Generate a card set from a PDF, video or your notes, then edit it so the cards are specific, short and worth reviewing.
On this page
Upload the PDF, paste the video link or use your existing notes, choose how many cards you want, and generate the set. CastIQ builds front-and-back cards and lets you choose from 5 to 100 per set. Then delete weak cards and split long answers so each card tests one thing.
The usual reason students give up on flashcards is not that they do not work, it is that making them is a chore. An hour of typing for twenty minutes of revision is a bad trade. Generating a first draft changes that.
From source to a flashcard set
- 01
Pick the source
A PDF chapter, a YouTube link, a photo of notes or text you paste. Smaller sources give more focused cards than a whole book.
- 02
Choose the card count
Options run from 5 to 100 cards. Use 15 to 30 for a single chapter. Larger sets take longer to generate and are harder to review in one go.
- 03
Generate
Each card has a question or term on the front and the answer on the back.
- 04
Edit before you study
Read the set once. Delete duplicates, merge near-copies and rewrite vague fronts.
What separates a good card from a bad one
| Weak card | Better card |
|---|---|
| "Photosynthesis" / a paragraph | "What are the two stages of photosynthesis?" / two short items |
| Front: "Newton's laws" | Three cards, one per law, each with an example |
| A fact that depends on the page it was on | A fact that makes sense on its own |
Check facts, especially numbers
Generated cards are a draft. Verify dates, figures and formulas against the source before you memorise them, because a wrong card is worse than no card.
Where this fits in a study week
- Generate cards at the end of each study session, while the topic is fresh.
- Review the pile for five minutes at the start of the next session.
- Add cards for things you got wrong on a practice test, not just from the source.
If you want to understand why this works, read active recall explained. For testing application rather than facts, try MCQ practice from your notes.
Example: flashcards from a chapter on the nervous system
After generating a set of 20 cards from a biology chapter, a typical edit pass looks like this. Two cards turn out to be duplicates, so they are merged. One answer is a full paragraph, so it is split into three cards. One card refers to "the figure on the previous page", which makes no sense on its own, so it is rewritten or deleted. Two cards test trivial wording rather than understanding, so they are removed. The result is a set of 17 sharp cards, and the ten minutes spent editing are part of the learning.
Types of cards worth having
- Definition cards: term on the front, definition and one example on the back.
- Cause and effect: "What happens to X if Y increases?"
- Compare and contrast: "How does A differ from B?"
- Formula cards: the formula on the back, with what each symbol means.
- Process cards: "What are the steps of ...?" with a numbered answer.
Flashcards in your own language
You can generate the cards in a different language from the source, which helps when the material is in English but you remember better in another language. For terms you will be examined on in English, keep the English term on the card. More on this in study notes in Hindi, Tamil, Telugu and more.
Make cards from your mistakes
The best cards usually come from what you got wrong on a practice test, not from the source text. Add a card for each mistake as you review.
Have a chapter to learn this week?
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Turn videos, PDFs and notes into notes, quizzes, flashcards and more.
Try CastIQ Free →Frequently asked questions
You can generate them, but you will learn more if you watch first. Use the cards to test what you took in, not to replace watching.
Fifteen to thirty is a good range for a chapter. If you need more, the chapter probably covers several topics that deserve separate sets.
Yes. The output language is a setting, and you can generate in one of 21 languages.