Online Stopwatch: Free Stopwatch with Lap Timer | Precise Timing

A The stopwatch uses requestAnimationFrame for smooth updates and is accurate to centiseconds (1/100th of a second).

A Yes, click the lap button (flag icon) while the stopwatch is running. Each lap shows split time and total time.

A Yes, fully responsive and works on all modern mobile browsers.

A Yes, completely free. No download or signup needed.

A While the online stopwatch requires an active internet connection to initially load in your browser, it generally needs to maintain that connection to function optimally. If your internet disconnects during use, the stopwatch might continue running for a period, but refreshing the page or closing the tab will likely reset it, and any recorded lap times will not be saved without an active connection.

A After you've recorded multiple laps using the "Lap" button, the online stopwatch automatically highlights your fastest lap time. Look for the lap entry that is visually distinguished, often by a different color or bolding. This makes it easy to quickly identify your best split among all the recorded intervals, perfect for timing races or tracking progress during workouts without any manual calculation needed.

A You can control the stopwatch without touching your mouse. Press 'S' to start or stop the timer. Hit 'L' to record a lap. And 'R' resets the whole thing. These shortcuts make timing events much quicker for things like sprints or kitchen timers.

A They vanish. This stopwatch runs entirely in your browser's memory, not on a server. No data gets saved when you close the tab or refresh the page. If you need to keep records, write them down or take a screenshot before navigating away. For a 5K race, I'd jot down splits between laps.

A That's not a glitch, it's centisecond precision at work. The timer counts in 1/100th second increments, so it hits 0.99 before rolling over to 1.00. This gives you finer granularity than a standard stopwatch that only shows tenths. For sprint timing or reaction tests, that extra digit matters. If you're measuring something like a 30-second plank, the hundredths won't change your results much.