alarm-clock.org/timer

Online Timer

Set a length of time, press Start, and the alarm rings when it reaches zero.

Time Remaining

Alarm sound

Set timer

hours
min
sec

How it works

Type a number of hours, minutes and seconds — or tap a preset — and press Start. The timer counts down and sounds an alarm when it reaches zero, even if you switch tabs (the tab title shows the time left). Pause and resume anytime, or Reset to start over. Space starts/pauses.

Counting down to a date or event instead? Make a countdown. Need to time how long something takes? Use the stopwatch.

Other timers

Timer FAQ

Is the online timer free? Yes — free, with no sign-up and no app to install.

Does it ring if I switch tabs? Yes, it sounds an alarm when it reaches zero, and the tab title shows the time left. For exact timing keep the tab open, as browsers can slow background tabs.

Can I set a timer for a specific length? Type any hours, minutes and seconds, or tap a preset like 5 min or 1 hr.

💡 How do we make alarm-clock.org better? Share an idea →

We want alarm-clock.org to be the best countdown, reminder, and event site online. If you have an idea to make it better, we'd love to hear it.

Every suggestion is read and reviewed. We can't promise to act on them all, but they directly shape what we build next.