# Online stopwatch

> Free online stopwatch with lap times to the hundredth of a second. Start, pause, lap and reset with the keyboard. Keeps time in a background tab.

URL: https://tools.cuelark.com/stopwatch
Publisher: Cuelark Team (https://cuelark.com)
Updated: 2026-11-10
Price: free, no sign-up
Privacy: runs in the browser; files are not uploaded

Time anything to a hundredth of a second, with laps that show both the split and the running total. Space starts and pauses; it keeps exact time even in a background tab.

## How to use it

1. Press Start or Space.
2. Press Lap to record a split; the list shows lap time and total.
3. Pause, resume, or press R to reset.

## Details

- **Precision:** Displayed to 0.01 s, measured from the system clock
- **Laps:** Unlimited, newest first, with split and total
- **Keys:** Space start / pause, R reset

## Questions

### Does it need an account or send anything?

No. It runs in this page with your device's clock. Nothing is stored on a server.

### How accurate is it?

It reads the system clock, so the total is as accurate as your device's clock; the display updates ten times a second. Human reaction time on the button (about 0.2 s) is the larger error.

### Does it keep running if I close the tab?

No. Switching tabs is fine, but closing or reloading the page stops it.

### Can I count down instead?

Use the Online timer for a countdown with an alarm.

## Related tools

- [Online timer](https://tools.cuelark.com/online-timer)
- [Pomodoro timer](https://tools.cuelark.com/pomodoro-timer)
- [Typing speed test](https://tools.cuelark.com/typing-test)
- [Keyboard tester](https://tools.cuelark.com/keyboard-test)