Online Stopwatch
A precise online stopwatch with lap times — 100% in your browser, no install.
About Online Stopwatch
A simple, accurate stopwatch that runs right in your browser. Start and stop the clock, resume where you left off, record lap times, and reset when you're done. The display updates smoothly with hundredth-of-a-second precision.
Everything runs locally — no install, no account, and it keeps timing accurately using your device's high-resolution clock. Handy for workouts, cooking, presentations or timing anything.
Lap timing
Start → Lap → Lap → Stop
Each lap shows its split (+time) and the total elapsed.
Resume continues from where you stopped; Reset clears everything.
Frequently asked questions
How accurate is the stopwatch?
It uses the browser's high-resolution performance clock, so timing is accurate to the millisecond and doesn't drift while running.
What do lap times show?
Each lap records the total elapsed time at that point, and the split — how long since the previous lap.
Does it keep running if I switch tabs?
The elapsed time is based on the real clock, so when you return it shows the correct time. Very long background pauses in some browsers may slow the on-screen updates, but the measured time stays accurate.
Do I need to install anything?
No. It works instantly in your browser with no install or sign-up.