Free online stopwatch with lap times plus a countdown timer with sound alert. Accurate, full-screen friendly, and runs in your browser. No signup needed.
First time here? Choose Stopwatch or Timer mode Your input is processed locally and disappears when you close the tab.
A stopwatch and a countdown timer cover a remarkable amount of life: workouts and rest intervals, exam practice, cooking, presentations, pomodoro sessions, lab procedures. Our free Stopwatch & Timer puts both in one clean page — a millisecond-accurate stopwatch with lap recording, and a countdown timer that sounds an alert at zero.
The stopwatch logs unlimited laps with split and cumulative times, ideal for interval training and timing repeated tasks. The timer accepts any duration in hours, minutes, and seconds, flashes the display, and plays an audible alarm when time's up. Both are driven by the browser's high-resolution clock and real timestamps, so they stay accurate even when the tab is in the background.
There's nothing to install and no account to create — bookmark it and it's ready in a second, working entirely offline once loaded. Estimate how long a speech should run with our Reading Time Calculator, or test your alarm volume with the Tone Generator.
Choose Stopwatch or Timer mode
For the stopwatch: Start, then tap Lap for splits
For the timer: set hours, minutes, and seconds
Start the countdown
Get an audible alert at zero
Reset and reuse as often as you need