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.
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.
It's a fast static site (Astro + Tailwind) that paints instantly from pre-built data, backed by an API (FastAPI + PostgreSQL) as the source of truth for the kana and kanji. Designed to load fast and work on any device.