An AI flashcard maker that cites its sources
Winda writes flashcards from your PDFs, articles, and videos, and each card links back to the document it came from. Spaced repetition brings every card back just before you would have forgotten it.
Spaced repetition, without building the deck yourself
Make a card without stopping
Select a sentence while you read — in the reader, in a PDF, in a chat reply, or on any page with the extension — and turn it into a card without leaving what you were doing.
Every card knows where it came from
Each card shows the document it was written from, so when an answer surprises you, you know where to reread.
A whole document at once
Point Winda at a whole chapter or article and it drafts a set of cards from what is in it. Keep the good ones and edit the rest.
Each card gets its own date
Answer from memory, then say whether you knew it. Cards you knew come back at longer and longer gaps; the ones you missed come back while they still need the work.
Your cards, your decks
Edit any card, write your own from scratch, sort them into decks, and share a deck publicly when it is worth passing on. Any deck exports to Anki, Quizlet or a spreadsheet.
How it works
Bring the material
Upload a PDF, paste a link, drop in a YouTube video, or select a sentence while you read.
Keep the cards worth keeping
Winda drafts them one at a time while you watch. Keep the good ones, edit the near misses, drop the rest.
Clear the day's queue
Winda shows you what is due. A few minutes a day is the whole habit — there is nothing to schedule yourself.
Where recall beats rereading
Use flashcards when the material has to still be there weeks later.
Formulas and definitions
The definitions, formulas, and rules an exam expects you to know cold, kept from the first reading through to exam day.
Courses that build on earlier units
Cards from week two keep coming back in week ten, at longer gaps each time, so the early material is still there when later units rely on it.
Language learning
Words and phrases from articles you are already reading in that language, each card linked back to the text it came from.
Work you have to know cold
Terms, systems, and workflows from onboarding docs and specs — anything you are expected to recall without looking it up.
Frequently asked questions
Yes. Generate cards from a whole PDF, or select a passage and make cards from just that. The same works for web articles, YouTube videos, slide decks, and your own text.
You answer from memory, then say whether you knew it. Winda spaces each card on its own schedule — knew it and the gap grows, forgot it and the card comes back sooner — and shows you what is due each day.
Yes. Every card is editable, you can write your own from scratch, and you can move cards between decks at any time.
Yes. Generating cards uses monthly credits, and the Free plan includes some every month. Reviewing cards never costs credits.
Yes. You can export any deck to Anki, Quizlet or a spreadsheet.
Make today's reading stick
Bring one PDF and let Winda write the first few cards. It takes about a minute.
Free to start · No credit card needed