Stopwatch & Timer
Time
Time anything with a lap-recording stopwatch, or count down with a timer that beeps when it reaches zero. Both stay accurate even if the tab is in the background, because timing is based on the system clock. No installs, no sign-up.
How to use
- Pick a mode: Stopwatch or Timer.
- Stopwatch: press Start, record laps, and reset when done.
- Timer: set hours, minutes, and seconds, then start.
- The timer plays an alarm sound when it finishes.
- Pause and resume the timer any time.
Frequently asked questions
- Does it stay accurate in the background?
- Yes. Timing is based on the system clock (Date.now), so the elapsed and remaining times stay correct even if the tab is inactive.
- Will the alarm sound play?
- It uses the Web Audio API and plays after you've started the timer. Make sure your device isn't muted.
- Are my times saved?
- No. This tool keeps nothing — reloading the page clears the stopwatch and timer.
- How precise is the stopwatch?
- It displays hundredths of a second and is driven by the high-resolution system clock.
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