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Replaces English words you read with Japanese kanji. Hover any word for kana, romaji, meaning & JLPT level. Learn Japanese vocabulary passively while you browse. Japanese Word Replacer scans the English pages you read and swaps everyday nouns for their Japanese kanji equivalent — right in the sentence, so you see real vocabulary in context instead of a flashcard deck. Hover any replaced word to see: • Kanji and kana • Romaji reading • English meaning • JLPT level (N5–N1) How it works • Pick which JLPT levels you want to practice (N5 through N1) — nothing is replaced until at least one level is selected. • Control how many words get replaced per page with a simple slider. • Block any site with one click from the popup if you'd rather it stayed English-only. Everything runs locally. The word list ships with the extension — no page content, browsing history, or personal data is ever sent anywhere. Great for JLPT learners who want to build vocabulary recognition through everyday reading rather than dedicated study sessions.
Jul 22, 2026
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