Stopwatch & Timer
Need to track time precisely? Use the stopwatch to start, stop, and record lap times effortlessly. Switch to countdown mode to set a timer for any duration, and get a loud alert when time is up – perfect for cooking, workouts, or productivity sprints.
How to Use
- 1Open the tool and select Stopwatch or Countdown mode from the tabs.
- 2In Stopwatch mode: press Start to begin, Lap to record split times, and Stop/Reset as needed.
- 3In Countdown mode: set your desired hours, minutes, and seconds, then press Start. The timer will count down and play an alarm when zero is reached.
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Frequently Asked Questions
Can I run the stopwatch in the background or when the browser tab is not active?
Yes, the timer uses setInterval and the page’s lifecycle; however, some browsers may throttle background tabs. For longer durations, the countdown uses absolute system time to remain accurate.
Does the alarm work on mobile devices?
Yes, the alarm uses the Web Audio API and also falls back to an <audio> element, which works on all modern mobile browsers.
Are the lap times saved after I close the tool?
No, lap data exists only during the current session. For permanent saving you can copy or screenshot the results.