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Turn Kindle highlights into flashcards with AI

DeckOwl is a browser tool, not a Kindle app. Paste your highlights or upload notes, PDFs and photos of pages, and get flashcards with spaced repetition.

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How to turn Kindle reading into flashcards

Readers who want Kindle app flashcards usually run into the same problem: highlights pile up on the device and never get reviewed. DeckOwl does not run inside the Kindle app and is not connected to Amazon's Kindle service. What it does is take text you already have, from a PDF, a Word file, pasted notes or a photo of a page, and turn it into flashcards you review in your browser.

Copy highlights from My Clippings.txt and paste them as plain text
Upload a PDF of a book chapter or a photo of a printed page
Review cards in the browser with spaced repetition
Export to Anki or CSV on the Plus plan

Example flashcards from Kindle reading notes

What file on a Kindle stores your highlights and notes?My Clippings.txt, found in the documents folder when the device is connected to a computer by USB.

What is Send to Kindle?A service that delivers supported files, such as PDFs, to a Kindle through an address tied to your account.

What is active recall?Trying to answer from memory before checking the text, which strengthens retention more than rereading a highlight.

Why does spaced repetition beat cramming?Reviewing at growing intervals, just before you would forget, builds stronger long-term recall than one long session.

What display technology does a Kindle use?E Ink, which uses tiny capsules of charged particles that move to form text, so the page holds without constant power draw.

Generate the full set

Built from what you read

Upload PDFs, slides, notes or photos of pages and get cards drawn from the text you actually studied.

Spaced repetition

Cards return at growing intervals, so you review each one just before you would forget it.

Study in the browser

Free accounts study right in the browser. Plus adds Anki and CSV export for moving cards elsewhere.

How it works

Collect your text

Copy highlights from My Clippings.txt or upload a PDF or a photo of the page.

Generate cards

DeckOwl drafts flashcards with a front and a back that you can edit before studying.

Review on schedule

Study each day and let spaced repetition bring back the cards you are about to forget.

Start with the highlights. Connect the Kindle to a computer with a USB cable and open the documents folder to find My Clippings.txt, a plain text file that holds your highlights and notes. Paste the entries you want into DeckOwl, then edit any card that is too broad before you begin reviewing with spaced repetition.

Exports are a paid feature. The free plan includes 3 generations per month and studying in the browser. Plus, at $39/year or $7.99/month, adds unlimited generations and PDF, DOCX, Anki and CSV export, so you can move cards into a dedicated flashcard app if you prefer.

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Frequently asked questions

How do I get my Kindle highlights out of the device?

Connect the Kindle to a computer with a USB cable and open the documents folder, where My Clippings.txt stores your highlights and notes. Open that file and paste the entries you want into DeckOwl.

How many flashcards should I make from one book chapter?

Aim for one card per key idea and split long chapters into sections. A smaller set of focused cards is easier to review consistently than a long deck you skip.

Does DeckOwl work inside the Kindle app?

No. DeckOwl is a separate browser tool and not a Kindle app or a plugin for one, so you copy or upload your reading material into it.

Do I need to pay to export flashcards?

Yes. The free plan lets you study in the browser with 3 generations per month, while PDF, DOCX, Anki and CSV export are included in Plus at $39/year or $7.99/month.

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Review the main ideas visually or practice recalling them.