Alarm clock
Online Alarm Clock
Set a time and keep this tab open.
No alarm set
Keep this tab open and your screen on. Browsers can pause or silence pages in a closed tab, a sleeping computer or a locked phone, so this is not a replacement for your phone's built-in alarm for anything critical.
How it works
Choose a time and press Set alarm. If the time has already passed today, the alarm is set for tomorrow. The alarm is saved on this device, so it survives a page refresh. When it rings, press Stop or Snooze for nine more minutes.
Need a countdown instead? Use the online timer or the power nap timer. To time something, the stopwatch.
Frequently asked questions
Will the alarm go off if my computer sleeps?
Probably not. Web pages cannot wake a sleeping device. Keep the tab open, the screen on and the volume up, and use your phone's alarm for anything important.
Which time zone does it use?
Your device's local time.
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Accurate to a hundredth, with lap times.
Classroom Timer
Huge, projector-friendly digits for lessons.
Interval Timer
HIIT, Tabata and circuits with countdown beeps.
Online Timer
Drag the dial to any time up to two hours.