About the project
Kana-Boo is a free, ad-free tool for learning hiragana, katakana and kanji. I build it with one simple goal in mind: to make studying Japanese easier, more visual and more enjoyable.
What you'll find
- Hiragana and katakana with a clear chart and interactive practice.
- Kanji organised by JLPT level, from N5 to N1.
- Quizzes that track your answer streak.
- Available in Spanish, English and Japanese, with several visual themes.
The story
I'm codecruz, a professional programmer and — for a while now — a Japanese learner. I wanted to bring those two worlds together into something useful, and that's how Kana-Boo came about. I maintain it in my spare time, with care and no rush.
How it's built
It's a fast static site (Astro + Tailwind) that paints instantly from pre-built data. Designed to load fast and work on any device.
Privacy
Kana-Boo asks for no account or sign-up. To learn how many people visit, it uses Umami, an anonymous statistics service that uses no cookies, no advertising and no cross-site tracking. Your progress, streaks and chosen theme are stored only in your own browser (localStorage). The statistics receive general, non-identifying data (the page visited, language, theme, device and browser type, approximate country and usage counters), never personal data.
Last updated:
The readings and English meanings of the kanji are based on KANJIDIC2 (EDRDG), licensed under CC BY-SA 4.0. The data has been modified. The level lists are the maintainer's own compilation, not official JLPT lists.