Utilore

Online Stopwatch

Press «Start» and the clock runs. Pause and resume as often as you like — the time is measured against the system clock, so it stays right even if you switch tabs.

00:00

Quick presets

The tab must stay open — the timer runs in your browser, with a short beep at the end.

How to use

  1. Press «Start» to begin counting.
  2. Press it again to pause; pressing once more continues from where you stopped.
  3. Press «Reset» to return to zero.

Good to know

Why a browser stopwatch can be trusted

The usual worry is that a page running in the background gets throttled and loses time. That happens to stopwatches that add up ticks. This one records the moment you started and subtracts it from the current time, so a throttled tab shows a stale number for a second and then jumps to the correct one — it never accumulates error.

Pausing without losing what you counted

Each pause stores the time already elapsed and each resume starts a fresh interval on top of it. That matters for anything measured in stretches — a workout with rest between sets, billable work interrupted by a call, a lesson split across activities.

Frequently asked questions

Does it keep running if I switch tabs?

Yes. The display may update less often in the background, but the elapsed time is read from the clock and stays exact.

Will it survive a page reload?

No. Reloading or closing the tab starts from zero — nothing is stored between visits.

How precise is it?

It shows tenths of a second. The underlying measurement is finer, but a human pressing a button is the real limit on precision.

Is there a countdown too?

Yes, the first tab is a timer that counts down and beeps when the time is up.

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