Free online tool
Free online stopwatch & timer.
A stopwatch to the millisecond and a countdown timer — an instrument, not an ad delivery vehicle. Accurate even when the tab is in the background or your laptop sleeps, because it counts timestamps rather than ticks. Nothing about you is tracked or sold.
How it keeps time
Time is measured from clock timestamps, never counted in ticks, so a backgrounded or throttled tab stays exact — check back after five minutes and it hasn't drifted.
If your machine sleeps mid-run, real time keeps counting, the way a physical stopwatch would in a closed drawer. When that happens the display adds a small SLEPT note showing how much of the run passed while asleep — already included in the total, not missing from it.
The timer's completion sound is scheduled the moment you press Start, so it rings on time even from a background tab.
- Free
- No ads
- No tracking
- No account
- Works offline once loaded
From the maker of Ans — a scientific calculator you can own. Same idea: a proper tool, nothing in the way.