Online Alarm Clock
Set an alarm time and leave this tab open. When the time arrives a chime plays and the page flashes. Useful for naps, reminders and cooking when your phone is out of reach.
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No alarm set
Choose a time and press Set alarm.How it works
The alarm uses your device clock and your local time zone. If the time you choose has already passed today, the alarm is set for the same time tomorrow. Press Set alarm before you walk away: browsers only allow a page to play sound after you have clicked something on it.
Keep the tab open and your device awake; supported browsers keep the screen on while an alarm is set. For a fixed length of time rather than a clock time, the online timer is easier.