About this site
A small collection of focused tools. Each one answers a single question well.
What this site is
This site is a small collection of focused tools. Each one answers a single question well â what does this cron expression mean, what time is it over there, what is the weather like. There is no dashboard, no account, and nothing to install.
Why one tool per page, instead of a toolbox
Large tool collections tend to be mediocre at everything they contain. This site takes the opposite approach: every tool has its own page, its own explanation and its own place in search results. If you need one of them, you land on exactly that one â not on a grid of a hundred links.
Where your input goes
Nowhere. The tools are plain JavaScript running in your browser, and no server of ours receives what you type. That is also why there is no sign-up: there would be nothing to attach an account to.
Where the data comes from
One tool fetches live data: the weather tool reads from Open-Meteo, a free and open weather API that requires no key. Time-zone conversions use the IANA time-zone database â the same source your operating system uses â so daylight-saving changes are handled correctly. Everything else is computed locally, in the page.
Why it is free
The site is free to use, and it is paid for by advertising. Ads are the reason there is no sign-up wall and no "pro" tier. The privacy policy explains what that means for your data, in plain language.
Contact
Found a bug, or think a tool gives the wrong answer? Write to 442332456@qq.com â corrections are the most useful thing you can send.