KotoLens – Japanese & Korean Reader

Highlight text and right-click to translate to/from Japanese & Korean with furigana, audio, grammar notes, and flashcards.

Read the real web in Japanese and Korean without losing the thread. Highlight any text, right-click, and pick a KotoLens option: • Translate to Japanese 日本語: see how to say it naturally, in context • Translate to Korean 한국어: the same for Korean • Explain in English: understand Japanese or Korean text you run into Each result gives you: ✓ Furigana over every kanji, with readings chosen for the context (今日 → きょう, not こんにち) ✓ Rōmaji / Revised Romanization, which you can switch off as you improve ✓ 🔊 Native text-to-speech for the phrase, the full sentence, and each word ✓ The whole sentence translated, so you see how your selection fits ✓ A vocabulary breakdown with dictionary forms and parts of speech ✓ Grammar points pulled from the actual sentence (〜ている, -(으)니까, 〜ので …) Build your own deck as you read: ＋ Add any word or phrase to flashcards with one click. Each card keeps its furigana, meaning, and example sentence ↻ Review with spaced repetition (Again / Hard / Good / Easy) ⇄ Study Japanese/Korean → English, or English → Japanese/Korean ⇩ Export to Anki (CSV), or back up and restore as JSON Privacy first: • Nothing is sent until you click a KotoLens menu item • No access to "all websites": KotoLens only sees the page you asked it to translate • No servers, no tracking, no analytics. Flashcards stay on your device. Powered by Claude. KotoLens uses your own Anthropic API key (get one at console.anthropic.com), so you pay Anthropic directly for what you use. Tip: press Alt+Shift+K to explain the highlighted text without right-clicking.