Japanese Furigana Extension

Adds furigana to Japanese kanji. Supports hiragana/katakana/romaji, JLPT filtering, hover mode. English & Chinese UI.

Japanese Furigana Extension automatically adds phonetic readings (furigana) to Japanese kanji characters on any web page, making Japanese content accessible to learners at all levels. ✨ Key Features: • One-click toggle from the toolbar popup • Three furigana formats: Hiragana, Katakana, Romaji • JLPT level filtering – skip kanji you already know (N5–N1) • Smart hover mode – show readings only on mouse hover • Customizable font size and color with 6 presets and live preview • Automatic Japanese site detection (lang, domain, meta tags) • Site whitelist for manual control • Full English and Chinese UI 🔧 Technical: • Powered by Kuromoji.js for accurate morphological analysis • Uses standard <ruby> HTML tags – no page layout disruption • Works fully offline – no external API calls • Optimized concurrent batch processing for performance Perfect for Japanese learners reading NHK News, Wikipedia, blogs, and any Japanese website.