Stopwatch
WEBA precise stopwatch with lap times that keeps running in your browser.
What it does
Stopwatch is a free, precise timer that keeps running entirely in your browser — no app download, no sign-up, no data sent anywhere. Start, pause, and resume the clock at any point; the display shows elapsed time down to centiseconds in MM:SS.cs format so you can time anything with real precision. Hit the Lap button while the watch is running to record a split: the tool stores each lap's cumulative time and calculates the individual split automatically, listing them newest-first so the most recent split is always at the top. The timer survives page interactions without drifting because the elapsed time is calculated from the real system clock rather than counting ticks, keeping it accurate over long runs. Fully offline, fully private — your times never leave your device.
How to use the Stopwatch
- Press Start to begin timing. The display shows elapsed time in MM:SS.cs format (minutes, seconds, centiseconds).
- While the stopwatch is running, press Lap to record the current split. The lap list appears below, showing each split time and the cumulative total, newest first.
- Press Pause at any point to freeze the timer without losing your elapsed time or laps.
- Press Reset to clear the timer and all recorded laps and start fresh.
Frequently asked questions
- Will the stopwatch lose accuracy if I switch tabs or leave the page?
- No. The elapsed time is calculated from the real system clock each time the display refreshes, not by counting internal ticks. So even if the browser throttles the timer while you are in another tab, the time shown when you come back will still be correct.
- How many laps can I record?
- There is no hard limit. You can record as many laps as you need in a single session. Each lap shows its individual split time and the cumulative total from start.
- Does the stopwatch keep running if I scroll or interact with the rest of the page?
- Yes. The timer runs in JavaScript independently of page layout, so scrolling, clicking, or resizing the window has no effect on it.
- Is there a maximum time the stopwatch can measure?
- Minutes are not capped at 59, so a very long run will display correctly — for example, 75:00.00 for one hour and fifteen minutes. The display just keeps counting.