Laps appear in-session only; refresh clears stopwatch data.

What is the difference between the two tabs?

Stopwatch counts up with lap splits; countdown counts down from minutes and seconds you set.

Does the stopwatch show centiseconds?

Yes. Elapsed time displays as MM:SS.cs with hundredths of a second while running.

Online stopwatch with lap times and countdown timer with audio alert. Fully client-side.

Runs locally — nothing is uploaded

1
Pick mode
Switch between stopwatch and countdown tabs.
2
Start timing
Run the stopwatch with lap splits, or set minutes and seconds for a countdown.
3
Pause or reset
Pause anytime and reset to start over.

Yes. A short beep plays when the countdown reaches zero (if audio is allowed).

Focus timer with work and break cycles. Customizable durations, cycle counter, and sound alerts.

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