Stopwatch & Timer
Stopwatch
00:00.00
Countdown timer
—
Runs on your device — works offline once loaded.
Common questions
How accurate is the stopwatch?
It reads the system clock, so elapsed time is accurate even if the display update skips a beat on a busy device — pausing and resuming accumulates correctly to the centisecond.
Will the countdown alarm sound if I switch tabs?
Yes — the timer keeps counting in the background and beeps at zero. Keep device volume on; the beep uses your browser's audio engine, no file download.
Why both a stopwatch and a timer?
They're the two directions of the same need: how long did this take (laps for intervals), and tell me when this is done (the kitchen, the workout rest, the parking meter).