Online timer

Set a time, press Start, and an alarm sounds when it reaches zero. Full screen, presets and keyboard shortcuts included.

HoursMinutesSeconds

Space Start/Pause · R Reset · F Full screen

Timer presets

1 minute timer 2 minute timer 3 minute timer 4 minute timer 5 minute timer 10 minute timer 15 minute timer 20 minute timer 25 minute timer 30 minute timer 45 minute timer 60 minute timer

This countdown timer runs on your device's real clock, not on a ticking counter, so it stays accurate even when you switch tabs or your browser slows background pages down. The time left also shows in the tab title, so you can keep an eye on it while you work in another tab.

Use the presets for common durations, or type any length up to 99 hours. Press +1 min to extend a running timer without restarting it. Your last duration is remembered for next time.

For classrooms, kitchens, workouts and meetings, switch to full screen: the digits scale to fill the display and stay readable from across the room. On phones, the screen is kept awake while the timer runs.

How to use it

Type hours, minutes and seconds, or choose a preset.
Press Start (or the Space bar). Press again to pause.
When time is up, an alarm plays until you press Stop.

Frequently asked questions

Does the timer keep running if I switch tabs?

Yes. It counts against the system clock, so it finishes on time even if the tab is in the background. Keep the tab open and the sound on so you hear the alarm.

Why don't I hear the alarm on my iPhone?

iPhones mute web audio when the silent switch is on. Turn silent mode off and raise the volume, then press Test on any alarm to check.

How long can I set the timer for?

Anything from 1 second to 99 hours, 59 minutes and 59 seconds.

Are there keyboard shortcuts?

Space starts and pauses, R resets, F toggles full screen and M mutes the sound.

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