Stopwatch & Countdown Timer

A stopwatch with laps and a countdown timer with an alarm sound. Works on mobile.

00:00.00

    How it works

    Time is measured from the device clock, so it stays accurate even if the tab is in the background. The alarm plays a short beep when the countdown ends; keep the volume up.

    Frequently asked questions

    Will the alarm ring if my phone is locked?

    Browsers may pause sound when the screen is locked. Keep the page open on screen for important timers.