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Turn your PDFs and slides into flashcards in your browser

DeckOwl is a web-based AI flashcard generator. Upload PDFs, DOCX, PPTX, notes or photos of pages, then study 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 account · 3 sets a month · Creates flashcards in seconds

Why DeckOwl is a browser tool, not a Chrome extension

Many students who search for a Chrome extension flashcard maker want one thing: cards built from the readings and slides they already have. DeckOwl is a web app rather than a Chrome extension, so you open it in your browser, upload your files and get a custom deck without copying text by hand.

Upload PDF, DOCX, PPTX, plain text or images of pages
Study with spaced repetition in the browser
Generate multiple choice, true/false and short answer quizzes with explanations
Export to Anki, CSV, PDF or DOCX on the Plus plan

Example Chrome extension development flashcards

What does manifest.json do in a Chrome extension?It declares the extension's name, version, permissions and scripts, and Chrome reads it when loading the extension.

What is a content script?JavaScript injected into web pages that can read and change the page's DOM, running in an isolated world.

What is a service worker in Manifest V3?A background script that handles events and can be stopped when idle, so it should not rely on global variables.

What do host permissions control?Which websites an extension can read and change, set with match patterns such as https://*.example.com/*.

What is chrome.storage used for?Saving extension data, with chrome.storage.sync for data that follows a signed-in profile and chrome.storage.local for on-device data.

Generate the full set

Built from your own material

Upload a PDF, slide deck, DOCX, text file or photo of a page, and DeckOwl writes flashcards from that content.

Spaced repetition

Cards come back at the intervals where you are most likely to forget them, so review time goes to the hard ones.

Quizzes and mind maps too

Turn the same source into multiple choice, true/false or short answer quizzes with explanations, or into a mind map.

How it works

Upload your material

Add a PDF, slides, notes or images. Photos of pages are read with text recognition.

Generate your cards

DeckOwl creates flashcards from the content, which you can review and study right away.

Study in the browser

Work through cards with spaced repetition. Exports to Anki, CSV, PDF or DOCX are available on Plus.

The cards come from your material, not a generic bank, so a chemistry lecture, a pharmacology chapter or a set of developer docs each produce their own set. You can study them in the browser on the Free plan, and upgrade to Plus when you want unlimited generations and exports to Anki or CSV.

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Frequently asked questions

How do I write good flashcards for a Chrome extension course?

Keep one concept per card, with a specific term on the front and a short accurate answer on the back. Cover each API, file and permission your course names, and split long definitions into separate cards.

Is DeckOwl a Chrome extension?

No. DeckOwl is a web app you use in your browser to upload files and study cards. It does not need to be installed as an extension.

Is there a free plan?

Yes. The Free plan includes 3 generations per month and studying in the browser, with no credit card needed to start. Exports require the Plus plan at $99.90/year or $9.99/month.

Can I export my flashcards?

Yes, on the Plus plan you can export to PDF, DOCX, Anki and CSV. Pro adds QTI 2.1 and Moodle XML export along with bulk upload.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.