hako.to

What is hako.to?

hako (箱) is the Japanese word for “box.” This is a small box of free, single-purpose web tools — each one does exactly one thing, runs entirely in your browser, and needs no account, install or download. No paywalls, no sign-ups. Open a tool, use it, close the tab.

Everything here is built and maintained as a personal project. The tools keep no server-side profile of you: scores, settings and progress live in your own browser’s local storage, not on an account. Where a tool shows an ad, it’s a single unobtrusive unit that helps cover hosting — nothing more.

Several tools come with plain-English reference guides — kana, week and lele each list their own. Recent changes are in the changelog.