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Feb 2026

What's new in Feb 2026!

Flashcards

Spaced repetition flashcards — all data saved locally

Ready-made Decks

How to create a custom deck

Create a .json file with the following structure and upload it using the button above.

{
  "name": "My Vocabulary Deck",
  "description": "Optional description",
  "cards": [
    {
      "front": "食べる",
      "back": "to eat",
      "reading": "たべる"
    },
    {
      "front": "飲む",
      "back": "to drink",
      "reading": "のむ"
    }
  ]
}

Fields

  • name required — The deck name shown in the deck list.
  • description optional — A short description of the deck.
  • cards required — Array of flashcard objects. Each card needs front and back, plus optional reading.
  • SRS scheduling is applied automatically to all cards.
  • Use a text editor or spreadsheet to create large decks, then export as JSON.
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