AlarmOnline24

About

Many web-based alarm clocks are obsolete or demand registration simply to use a timer. AlarmOnline24 offers a modern alternative: a free browser alarm clock that launches immediately on all devices. It features quick preset timers for 5, 10, 15, 30, and 45 minutes, plus 1 or 2 hours. You can choose from multiple sounds, adjust the volume, and watch a real-time countdown with a progress tracker. Dark mode is also included. There are no downloads and no sign-ups required, ever. Simply open the tab, set your alarm, and return to your tasks.