Online Stopwatch
Free online stopwatch with lap times. Start, stop, and reset with a clean interface. Record splits and export lap data.
About Online Stopwatch
This Online Stopwatch provides a clean, distraction-free way to time anything directly in your browser. The large, easy-to-read display shows hours, minutes, seconds, and milliseconds so you always know exactly where you stand.
Simple controls
Three buttons are all you need: Start to begin timing, Stop to pause, and Reset to return to zero. The interface is deliberately minimal so the focus stays on the time.
Lap and split times
Press the Lap button while the stopwatch is running to record a split. A table below the display logs every lap with its number, individual lap duration, and cumulative total. This is ideal for workouts, cooking steps, study intervals, or any task where you need to track segments.
Reliable timing
The stopwatch calculates elapsed time from high-resolution timestamps, not from counting frames or intervals. That means switching tabs, scrolling, or briefly losing focus does not cause drift. When you return, the display catches up instantly.
Just open the page, hit Start, and time whatever you need. If you need a fixed-duration timer instead, try the countdown timer. Works on any modern browser, desktop or mobile.
Frequently Asked Questions
How accurate is the online stopwatch?
The stopwatch uses your browser's high-resolution performance timer combined with requestAnimationFrame for smooth visual updates. Accuracy is typically within a few milliseconds, which is more than sufficient for everyday timing tasks.
Can I record lap times?
Yes. Press the Lap button while the stopwatch is running to record a split. Each lap entry shows the lap number, the time for that individual lap, and the cumulative total time. All laps appear in a table below the main display.
Does the stopwatch keep running if I switch tabs?
Yes. The stopwatch tracks elapsed time based on timestamps rather than frame counting, so switching to another tab or minimizing your browser does not affect accuracy. The display updates when you return.
Can I use keyboard shortcuts?
Currently the stopwatch is controlled with on-screen buttons. You can press Space to start and stop, and the interface is designed for quick access on both desktop and mobile devices.