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(days)(hours)(minutes)(seconds)
How to use the 28-hour timer
- Check that the countdown shows 28 hours, then press START. The timer does not begin until you do.
- Press PAUSE to hold the countdown and RESUME to continue. RESET returns it to 28 hours.
- When the countdown reaches zero, the alarm rings. Press STOP to silence it.
Other durations
Common questions
How can I check the alarm sound before starting?
Press TEST SOUND. It plays the alarm without starting or changing the countdown, so you can adjust your device volume first.
Do I need to install anything or sign in?
No. The alarm sound is generated in your browser, and once the page has loaded, the countdown does not need a network connection.
Will the alarm ring if I switch tabs or my device goes to sleep?
Keep this tab open, your device awake and the sound on. Browsers may slow down background tabs, and power-saving settings can delay the alarm. It may not ring at all if the tab is closed or the device sleeps.
Can I change the duration on this page?
This page counts down a fixed duration. To use a different length, choose another timer from the lists below.