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A flashcard web app that turns your own notes into a study deck

Upload a PDF, slides, notes or a photo of a page and get flashcards with spaced repetition, ready to study in the browser.

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 to look for in a flashcard web app

Choosing the best flashcard web app usually comes down to three things: where your material comes from, whether review is spaced out over time, and whether you can take your cards somewhere else when you need them.

Runs in the browser, so there is nothing to install
Accepts your own PDFs, slides, notes and page photos
Schedules reviews with spaced repetition
Exports to Anki or CSV on the Plus plan

Example web development flashcards

What does the CSS box model include, from inside out?Content, padding, border, then margin, moving outward from the element.

What does HTTP status 404 mean?Not Found: the server cannot find the requested resource at that URL.

What is the purpose of the HTML doctype declaration?It tells the browser which HTML version the page uses, written as <!DOCTYPE html>, so it renders in standards mode.

What does the same-origin policy restrict?It stops scripts on one origin from reading responses from another, where origin means the same scheme, host and port, unless CORS headers allow it.

What is the difference between localStorage and sessionStorage?localStorage persists until it is cleared, while sessionStorage is cleared when the tab or window closes.

Generate the full set

Any file becomes cards

Upload PDF, DOCX, PPTX, plain text or photos of pages. Text in images is read with text recognition.

Spaced repetition built in

Cards you miss come back sooner, so your review time goes to the material you are forgetting.

Study in the browser

The free plan lets you study in the browser. Exports to PDF, DOCX, Anki and CSV are part of Plus.

How it works

Upload your material

Add a PDF, slide deck, document, set of notes or a photo of a page.

Review the generated cards

Check the flashcards and edit anything that does not match your course.

Study on a spaced schedule

Work through the deck in your browser and let spaced repetition decide what comes back next.

Source material matters most. A web app that only accepts typed cards means spending an evening copying lecture slides by hand. DeckOwl reads PDF, DOCX, PPTX, plain text and photos of pages, then drafts the flashcards for you to check.

Spaced repetition is the other half. Cards you get wrong come back sooner, and cards you know drop out of the rotation. The free plan lets you generate three decks a month and study in the browser; Plus adds unlimited generations and exports to Anki and CSV.

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Frequently asked questions

How many flashcards should I make for learning HTML and CSS?

Start with the terms you cannot explain yet, then add cards as new topics come up. A focused deck is easier to review than one that covers an entire course.

What is a good way to study HTTP status codes with flashcards?

Put the code on the front and its meaning plus a typical cause on the back, such as 404 for a missing resource. Review the 4xx and 5xx groups separately so each class sticks.

Is DeckOwl free to use?

The free plan includes 3 generations per month and studying in the browser. Exports to PDF, DOCX, Anki and CSV are part of the paid Plus plan.

Can I export my flashcards to Anki?

Yes, on the Plus plan, which also includes unlimited generations and spaced repetition.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.