Stopwatch & Timer
A stopwatch with laps, a countdown timer, and a Pomodoro focus timer — all with an audio alert.
Runs in your browser. Nothing is uploaded.Stopwatch & Timer in 3 steps
Pick a mode
Stopwatch for counting up, Countdown for counting down to zero, or Pomodoro for a focus/break cycle.
Set your time
For countdown, use a preset or type a custom duration.
Start and track
The page title updates live with the remaining time, and an audio alert plays when a countdown or Pomodoro session ends.
Why use this Stopwatch & Timer
Questions about this tool
Will the timer keep running if I switch tabs?
Yes — the timer keeps counting in the background using real timestamps, not just a visual animation, so switching tabs or briefly minimizing the browser won't throw off the count. Very long backgrounding on mobile browsers can occasionally pause JavaScript timers, though.
How does Pomodoro mode work?
It automatically alternates 25-minute focus sessions with 5-minute breaks, playing an audio alert and switching phases automatically at the end of each — a simple implementation of the popular Pomodoro time-management technique.
Does the tab title really show my countdown?
Yes, while a countdown or Pomodoro session is running, the browser tab's title updates to show the remaining time, so you can glance at your open tabs without switching to this one.
Where does the alert sound come from?
It's generated live using the Web Audio API's oscillator — a simple tone synthesized in your browser, not an audio file, so it works instantly with no download.