FlashDeck is a flashcard app that runs entirely inside a web page: build decks, study them with a real spaced-repetition scheduler, and export everything to CSV. It exists because the useful core of a flashcard tool — a queue, an honest grading loop, and a schedule that decides what’s due — fits comfortably in a browser, with no account and no server in the middle.

What it does

• Decks and cards. Create as many decks as you like; cards hold front/back text with a small markdown subset. Two sample decks (Spanish essentials, world capitals) ship so the study loop is visible in the first minute.
• A real scheduler. Cards carry an ease factor, a repetition count and a day-granularity interval; a four-button grading row (Again / Hard / Good / Easy) drives the schedule, and lapses come back within the session.
• CSV in and out. Import a two-column file to build or extend a deck; export any deck back to the same format for backup or migration.
• Session stats. Recall rate, grade breakdown, lapses and time at the end of every session.

The one opinion that shaped the site

Scheduling math shouldn’t be a black box you have to trust. FlashDeck runs a variant of SM-2 — the algorithm Piotr Wozniak published for SuperMemo — and the algorithm page states the exact parameters: the grade-to-quality mapping, the ease-factor formula, the interval ladder and the lapse rules, plus an honest list of how it differs from Anki’s scheduler. If you want to verify a claim, you can watch any card’s interval in the deck manager and check it against the published table.

What it deliberately doesn’t do

No accounts, no cloud sync, no shared-deck marketplace, no mobile app to install. Decks live in your browser’s localStorage, which keeps the privacy story boring and the page fast — and means your CSV export is the real backup. If you need multi-device sync, this tool will honestly disappoint you; the CSV page explains how to move decks instead.

Who’s behind it

FlashDeck is maintained by an independent studio that ships focused, single-purpose web utilities. FlashDeck’s test suite asserts the scheduler the algorithm page documents: three Good grades on a new card give 1, 6 and 15 days, ease never drops below 1.3, and corrupted saved decks must not stop the app loading. The scheduler, study screens and page text were written with AI coding and writing assistants, directed by the people who run the studio. Corrections — a mistranslated card in a sample deck, a scheduler behavior that doesn’t match the documented formula, an import that eats your file — are the mail we want most. See the contact page.