Nihongo Tint

Color-code Japanese grammar on any page. Click words for instant lookups. Free AI flashcards and quizzes.

Read more Japanese, more confidently. Nihongo Tint highlights every Japanese word on the page by its grammatical role — particles in one color, verbs in another, nouns in a third — so the structure of every sentence is visible at a glance. No popups, no setup, no API keys. Just open a page and start reading. WHAT IT DOES ★ Always-on grammar tinting. Particles, verbs, nouns, adjectives, adverbs, auxiliary verbs, conjunctions, and more — each gets its own color across every page you read. ★ Click-to-lookup sidebar. Tap any tinted word to see its dictionary definition (Jisho), reading, romaji, and example sentences (Tatoeba) — all in one place. No need to leave the page. ★ Sentence context. When you click a word inside a YouTube comment, the sidebar shows the whole sentence with your clicked word highlighted, plus a play button to hear it aloud. ★ Built-in audio. Click ▶ to hear any word or sentence read aloud. Uses your browser's built-in voice — no network calls, no API costs. ★ AI-powered vocabulary flashcards. Open the popup and tap "Vocabulary flashcards" to extract topic-specific words from whatever you're reading. Powered by Chrome's on-device Gemini Nano — completely private, no data sent anywhere. ★ AI comprehension quizzes. Test whether you actually understood what you read. Same on-device AI, free and offline. ★ YouTube-aware. Color-codes captions, English→Japanese translation overlays on comments, focuses content to what you're actually watching (skips the recommended sidebar). ★ Per-site toggle. Turn the extension on and off per domain with one click. WHO IT'S FOR Japanese learners at any level. Beginners get a visual scaffold for grammar; intermediates get instant lookups without breaking flow; advanced readers get fast vocab and comprehension drilling on real-world content. PRIVACY Nihongo Tint does not collect, transmit, or sell any personal data. The extension stores a few preferences locally on your device and never sends them anywhere. Dictionary lookups go directly from your browser to Jisho's public API. AI features run entirely on-device using Chrome's Built-in AI — no servers involved. FREE TO INSTALL, NO ACCOUNT REQUIRED The whole v1 experience is free: tinting, dictionary lookup, sidebar, audio playback, AI flashcards, comprehension quizzes. No ads, no tracking, no required subscription. The core experience stays free forever. A future release may add optional credit packs for premium cloud voices (high-quality Google TTS) — those have a real per-use cost. Everything that costs nothing to run stays free. OPEN TO FEEDBACK This is a working solo-developer project. If something breaks or you have an idea, reach out via the support email — we read everything.