Stopwatch, Timer & Alarm
betaThis free tool combines a stopwatch (with lap times), a countdown timer, and an alarm clock in one page. It runs entirely in your browser and plays a beep when the timer reaches zero or an alarm time arrives — just keep the tab open.
A stopwatch, countdown timer and alarm clock in one — runs in your browser, no sign-in. Keep this tab open and it will beep when the time is up.
0:00.00
Everything runs on your device. The alarm needs this tab to stay open to ring.
How to use Stopwatch, Timer & Alarm
- 1 Pick a tab: Stopwatch, Timer, or Alarm.
- 2 Stopwatch: click Start, use Lap to record splits, and Reset to clear.
- 3 Timer: set minutes and seconds, click Start, and it beeps at zero.
- 4 Alarm: choose a clock time (and an optional label), click Add alarm, and it rings at that time.
Frequently asked questions
Does it work offline?
Yes. Everything runs in your browser with no server, and once the page is loaded it keeps working offline. The tab needs to stay open for the timer or alarm to ring.
Why does the alarm only ring while the tab is open?
The sound is played by this page, so the browser tab must stay open (and not fully asleep) for the beep to fire. Keep it in a visible or background tab.
Is there a lap timer?
Yes. On the Stopwatch tab, click Lap while it runs to record each split; the list shows both the total time and the time since the previous lap.
How is this different from the Countdown Timer?
The Countdown Timer counts down to a future date (like a deadline or event). This tool is for short, everyday timing — a stopwatch, a minutes/seconds timer, and a wake-up alarm.