Set a duration and get an alarm when it ends.
This timer counts down from a duration you set and plays an audible alarm using your browser’s Web Audio API when it reaches zero — no app install, no ads playing over your alarm sound, no account.
It works for anything that needs a simple countdown: a cooking timer, a workout interval, a timed exam section, or a presentation slot. Start, pause, and reset behave as expected — pausing keeps the remaining time, reset returns to your set duration.
Keep this browser tab open while the timer runs; like any browser-based timer, it stops counting if the tab is closed, though it will continue running in a background tab (just muted alerts on some mobile browsers unless the tab is active when it completes).
Behavior varies by device and browser — many mobile browsers respect the system silent switch for web audio, so keep sound on or check the tab visually near the end.
Yes, it continues running in the background as long as the tab stays open; only closing the tab stops it.
This version caps at 180 minutes. For longer durations, use the Countdown to Date/Time tool instead and set a specific target time.
On the Pomodoro Timer page, the timer automatically switches between a 25-minute work interval and a 5-minute break, repeating until you press Reset — you do not need to manually restart it after each interval.