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JLPT 単語学習ツール

テキストを貼るだけ。AIが重要単語を抽出し、学習カードに変換します。

Build Vocabulary Free

How It Works

1. Paste a passage

Drop in a news article, textbook page, or word list — any Japanese text up to 10,000 characters.

2. AI extracts key words

The AI picks out the vocabulary worth learning and builds cards with readings, meanings, and context.

3. Drill & save

Study as flashcards or quizzes, track accuracy, and save the deck to review later.

Why Context Beats Word Lists

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Learn words where they live — Vocabulary pulled from real passages sticks better than isolated list entries, because you remember how the word was used.
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Match your exact level — Cards inherit the difficulty of whatever you paste — read N3 material, build N3 vocabulary.
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Three study modes — Turn the same words into flashcards, 4-choice quizzes, or fill-in-the-blank exercises.
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Multilingual meanings — Get definitions in Japanese, English, or Chinese.
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Save and review — Free accounts save 3 decks; Pro removes the limit for ongoing vocabulary tracking.
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No login to start — Build your first vocabulary set immediately; sign up only to save.

Frequently Asked Questions

How does the JLPT vocabulary builder work?

Paste any Japanese text — a news article, textbook page, or vocabulary list — and the AI identifies key words, then builds front/back cards and quizzes around them. You study the vocabulary in the context it actually appeared in.

Which JLPT levels does it cover?

N5 through N1. Because cards come from text you choose, the difficulty naturally matches your material. Paste N3-level reading and you get N3-level vocabulary cards.

Is it better to learn vocabulary in context or from word lists?

Both have value, but learning words in context — the way the vocabulary builder works — improves retention and helps you remember usage, not just meaning. Pasting real passages you are reading is the most effective approach.

Is the vocabulary builder free?

Yes. Generating vocabulary cards is free with no account. A free account saves up to 3 decks; Pro ($5/month) removes the limit.

Can I quiz myself on the vocabulary?

Yes. Every generated set can be studied as flashcards, 4-choice quizzes, or fill-in-the-blank — all from the same source text.

Start building your vocabulary

Paste a passage and get your first JLPT word deck in under a minute — free, no account needed.

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