Time Lab

Clock, stopwatch, timer, and alarm in one place. Style and timezone stay in the browser.

How to use

On the clock tab, pick a style and LCD color. Settings stay in this browser.
Pick a city on the map or from the list to change the timezone. The clock still runs if the map fails.
Stopwatch, timer, and alarm keep state across tabs. Alarms only fire while this tab is open.

Input, output, limits

Time comes from the browser local clock or the selected timezone. Alarms and settings stay in localStorage and are not sent to a server. Closing the tab stops alarms.

Example

Choose 7-segment with green LCD, then pick Seoul. Start a 5-minute timer; remaining time stays correct after you leave and return.

FAQ

Do alarms fire if I close the tab?

No. They only run while this page is open.

Is the time uploaded?

No. The clock and settings stay in the browser.

Timezones?

Pick a city on the map or list to show that zone’s time.

Fullscreen and picture in picture?

Fullscreen expands only the clock stage. Picture in picture appears only in supporting browsers.