Stopwatch & Timer

It uses the browser's performance.now() API, which provides sub-millisecond resolution — far more accurate than Date.now(). In practice you'll see precision to within a few milliseconds, which is more than sufficient for most timing needs. Professional timing equipment used in sports is typically accurate to ±0.001s.

Yes. The timer tracks elapsed time using timestamps, not frame counting, so it continues accurately even when the tab is backgrounded or your screen is off. The display may update less frequently in background tabs due to browser throttling, but the underlying time is correct.

The Pomodoro technique is a time-management method where you work in focused 25-minute intervals separated by short 5-minute breaks. After four "pomodoros," take a longer 15–30 minute break. It's widely used to combat procrastination and maintain focus throughout the day.

Start the stopwatch, then press LAP each time you want to record a split. Each lap shows your split time (time since last lap) and cumulative total. The fastest lap is highlighted green, the slowest in red — useful for running, swimming, or any repetitive timed activity.

Yes — the timer plays a short alert tone using the Web Audio API when the countdown reaches zero, and the display flashes red. No plugins or permissions needed. Make sure your device volume is on.

Absolutely. The tool is fully responsive and works on all modern mobile browsers. For best results on iOS, keep the screen active or adjust your auto-lock settings, as iOS aggressively throttles background browser tabs.