Press Lap while the stopwatch runs to record the current time as a split. Each lap shows both the total elapsed time and the gap since the previous lap, so you can compare splits at a glance.

Does it stay accurate in a background tab?

Yes. Time is calculated from timestamps rather than by counting ticks, so even if the browser throttles the page in the background, the reading corrects itself the moment you return.

Completely free with no sign-up, and it runs entirely in your browser — nothing is uploaded.

Omnibus

Timer Stopwatch Alarm Pomodoro Interval

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Online stopwatch with laps

A simple, accurate stopwatch for timing anything — a workout, a presentation, a lap of the track. Start and stop with one button, and hit Lap to record split times without stopping the clock.

The elapsed time is measured from real timestamps, so it stays accurate to the hundredth of a second even if you switch tabs or your device sleeps for a moment.

Need a plain countdown? Use the online timer.

More timers

Countdown Timer

Set a time and count down to zero with an alarm.

Alarm Clock

Set a time of day and get an alarm.

Pomodoro Timer

Focus in work/break cycles that auto-advance.

Interval Timer

HIIT & Tabata work/rest rounds with audio cues.

Stopwatch — frequently asked questions

How do laps work?: Press Lap while the stopwatch runs to record the current time as a split. Each lap shows both the total elapsed time and the gap since the previous lap, so you can compare splits at a glance.
Does it stay accurate in a background tab?: Yes. Time is calculated from timestamps rather than by counting ticks, so even if the browser throttles the page in the background, the reading corrects itself the moment you return.
Is it free?: Completely free with no sign-up, and it runs entirely in your browser — nothing is uploaded.

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