HeroTools / Productivity
Local · Private · Free

Flashcards

Create study decks and learn faster with flip cards and spaced repetition. Cards you struggle with come back sooner; cards you know drift further out. Everything is saved in your browser — no account, no upload.

Saved only in this browser — nothing leaves your device.
No decks yet — tap + New deck to create one, or import a deck from JSON. ✦

Deck

0 / 0
Front
Click or press Space to flip
Back
How well did you know it?
Shortcuts: Space flip · 1 Again · 2 Got it

Round complete!

How the boxes work: every card sits in a Leitner box (1–5). Mark a card Got it and it moves up a box and won't be due for longer; mark it Again and it drops back to box 1 to be reviewed soon. Box 1 cards repeat within a day, while box 5 cards wait about two weeks — so your time goes to what you haven't learned yet.

Deck

FrontBack
    No cards yet — add one above, or use Bulk add to paste many at once.

    Study smarter — and keep your decks to yourself

    Spaced repetition is one of the most effective ways to memorise anything — vocabulary, formulas, definitions, exam facts. But most flashcard apps put your decks behind an account and sync them to the cloud. This one keeps every deck and your review history in your browser's local storage: build a deck, study with satisfying flip cards, and let the Leitner system schedule what to review next. Export any deck as JSON to back it up or share it, and import it on another device. Fast, offline-friendly, completely private. Free forever.

    About Flashcards

    Flashcards is a free, private productivity tool that runs entirely in your web browser. Create study decks and review with flip cards & spaced repetition — local. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for flashcards, study, spaced repetition, learn. Like every HeroTool by Digital Heroes, Flashcards is 100% free with no limits.

    How to use Flashcards

    1. Open Flashcards — it runs entirely in your browser, with no signup.
    2. Fill in the fields or choose the options you want.
    3. Adjust the options to match exactly what you need.
    4. Copy or download your result — it is free, and your data stays on your device.

    Frequently asked questions

    Is Flashcards free?

    Yes — Flashcards is completely free for everyone. No sign-up, no account and no usage limits.

    Is it private? Are my files uploaded anywhere?

    No. Flashcards runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

    Does it work offline?

    Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

    Do I need to install anything or create an account?

    No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

    What does Flashcards do?

    Create study decks and review with flip cards & spaced repetition — local.

    Related Productivity tools

    Browse all Productivity tools →

    Project BoardA beautiful Asana-style board — labels, assignees, due dates, subtasks & drag-drop. Saves locally.▥Kanban BoardA private kanban that saves to your browser. Export/import JSON.NotesA fast local notebook with Markdown — stays on your device.Invoice GeneratorCreate branded invoices and export to PDF. Logo included.Pomodoro TimerFocus timer with task list and session stats.Business CalculatorsMargin, markup, break-even, ROI & CAC:LTV — instant business math.