About ClockHubs

ClockHubs is a small, independent collection of free time tools — a clock, an alarm, a timer, a stopwatch, a world clock and a handful of others — built to load instantly and do exactly one thing each.

The site is run independently, not by a company or a network. It started from a simple frustration: the tools people need most often — a timer while cooking, an alarm on a borrowed laptop, the current time in another country before making a call — were all buried in apps, wrapped in sign-up walls, or hosted on pages so heavy that the clock arrived after the moment had passed.

What we are trying to get right

• Speed. Every page is pre-rendered static HTML with a few kilobytes of JavaScript. There is no framework to download, no data to fetch before the clock appears, and no layout shifting around as things load.
• Doing one thing. Each tool is a single page with the controls visible immediately. No dashboards, no onboarding, no modal asking you to create an account.
• Privacy. Your alarms, saved cities and preferences are stored in your own browser's local storage. Nothing is uploaded, there are no accounts, and there is therefore nothing for us to lose or sell. See the privacy policy for the detail on advertising and cookies.
• Accuracy. Times are read from your device's system clock, and time zone calculations use the IANA time zone database — the same dataset operating systems and airlines rely on — so daylight saving is applied correctly rather than approximated.
• Working offline. A service worker caches each tool after your first visit, so it keeps running with no connection. You can install the site as an app from your browser's menu.
• Restrained advertising. The site is funded by ads, which pay for the domain and hosting. We keep them to the page edges rather than in the middle of a tool, and we do not use pop-ups, interstitials or anything that hijacks a tap.

How the content is written

The explanatory writing on each tool page — how a chess clock increment works, why browser alarms behave differently from phone alarms, what the tempo markings mean — is written by hand, checked against the actual behaviour of the tool it describes, and corrected when we get it wrong. Where a tool has a real limitation, the page says so plainly rather than glossing over it. If you find something inaccurate, please tell us; corrections are welcome and we would rather know.

The tools

• Clock — Analog & digital online clock
• Alarm — Set an online alarm
• Timer — Countdown timer
• Stopwatch — Stopwatch with laps
• World Clock — Times around the world
• Countdown — Count down to a date
• Chess Clock — Two-player game clock
• Metronome — Tempo / BPM
• Random Number — Random number generator
• Time Calculator — Duration & date math
• Public Holidays — US, UK, Canada & Australia

How it is built

ClockHubs is a static site generated with Eleventy and served from a global CDN. There is no database, no back end and no server-side code handling your input, which is both why it is fast and why there is so little to say about what happens to your data: the calculations run in your browser and stay there.

Get in touch

Suggestions, bug reports and requests for tools we have not built yet are all genuinely useful — several of the tools here exist because someone asked. Email [email protected] or use the contact page.