About Decky.onlinePrintable flashcards for teachers, made in your browser.

Decky.online is a free, browser-only tool for building printable flashcards. You paste or type card content, pick a template, choose colours, and download a print-ready PDF. Every card you make stays inside your browser — nothing is uploaded to a server.

What it does

• Four card templates: Quote, Vocabulary, Q&A, and Concept.
• Multi-script: Latin, Cyrillic, Greek, Hebrew, Arabic (and Persian / Urdu / Pashto), Devanagari (Hindi / Marathi / Nepali / Sanskrit), Bengali, and Japanese kana + kanji. Bidi-aware layout — a Hebrew quote with Latin numerals like 1967 renders correctly.
• Print-ready PDF export, in single, fold, or double-sided modes. 1, 2, or 4 cards per A4, B4, or US Letter sheet, portrait or landscape.
• Long-edge or short-edge duplex flip with auto-mirrored backs, so two-sided prints line up after you flip the page.
• Crop marks at every card corner so you can cut accurately with scissors or a guillotine.
• Per-card image upload with size + position controls.
• Per-card colour themes; pick from 16 named presets or create your own.
• Compressed .deck export / import so you can save your work or share it with a colleague — the file format the samples ship in is the same one your exports produce.

Why browser-only

We don't ask you to sign in. We don't store your cards on a server. We don't have a backend. Everything happens in the browser tab you have open right now: PDF generation, font rendering, image processing, deck storage. Your active deck autosaves to your browser's IndexedDB so a reload doesn't lose your work.

For privacy specifics — what we do collect (small aggregate analytics) and how to opt out — see the Privacy policy.

Who it's for

Teachers preparing classroom materials. Language tutors making vocabulary decks. Trainers who want to print their content instead of putting it behind a login. Anyone who wants a flashcard quickly without an account, a subscription, or a sync server.

Design choices

Print-first, screen-second

Most flashcard apps optimise for a quiz interaction on screen. Decky optimises for the printed page: rectangular cards in a regular grid, dashed cut lines, mirrored duplex backs, adjustable density. The on-screen preview shows exactly what the PDF will be.

Fonts that work

Multi-script support is the reason the bundle is large (~12 MB of Noto fonts), but each family is lazy-loaded only when a card actually contains glyphs in that script — so a deck of English quotes never downloads the Hebrew or Arabic font.

No accounts, no sync

IndexedDB persistence is enough for one device. To move a deck across devices or share it with a colleague, export it as a .deck file and import on the other side. The file is gzip-compressed JSON; you can also read or edit it externally if you ungzip it.

Source & contact

Questions, feedback, bug reports: info@decky.online. Bundled fonts are released under the SIL Open Font License (Noto Sans family). Sample deck images come from Wikimedia Commons / NASA — see the credits file shipped in the source repo for full attribution.