Online Stopwatch

What it does

A free online stopwatch with millisecond precision, lap splits, and start/pause/reset controls. Everything runs in your browser — no sign-up, no ads, no syncing. The tab can sit in the background and the count keeps going accurately.

Stopwatches are useful for workouts, interval training, cooking, speeches, and any “I want to know how long this took” situation. The lap button captures a split without stopping the clock — great for tracking each set in a workout or each segment of a multi-stage task.

How to use it

1. Click Start to begin timing.
2. Tap Lap to capture a split without stopping the overall timer.
3. Pause to hold, Resume to continue from the same point.
4. Reset clears the clock and all laps when you’re done.