Stopwatch & Timer
Two precision timekeepers in one: a lap stopwatch and an alarm countdown. Accuracy is anchored to your device clock.
⏱️ Stopwatch
⏳ Countdown timer
What people time with these
Workouts and rest intervals, cooking, study sessions, meeting timeboxes, presentations, and board games. The stopwatch keeps counting accurately even if you switch tabs — it is anchored to your device clock, not to a loop that sleeps in the background.
Why it stays accurate
The stopwatch does not count timer ticks — it subtracts timestamps from your device clock, so background throttling by the browser cannot make it drift. Lap times are captured at the millisecond you press the button. For the countdown, the alarm is scheduled against wall-clock time, which is why it fires on time even after the tab has been asleep for an hour.
Frequently asked questions
Will the countdown still alarm if I switch tabs?
Yes — the alarm fires based on wall-clock time, so it beeps when the target moment arrives even if the tab was backgrounded (browsers may throttle the display update, but not the alarm).
Does the timer work offline?
Yes. Once the page has loaded, both timekeepers work without any internet connection.