Set loud, reliable wake-up alarms and schedule reminders directly in your web browser. Whether you need a morning wake-up alert, a cooking timer, or a medication prompt, a browser-based alarm clock triggers audible alerts without requiring native mobile apps or standalone clock hardware.

This tool uses the browser's native Web Audio API to synthesize an acoustic alarm tone rather than streaming external MP3 sound files. When the current clock matches your scheduled alarm time, an AudioContext oscillator generates an 800 Hz square wave routed through a volume gain stage, producing a clear, piercing electronic alert that sounds reliably even if your internet connection disconnects after loading the page.

For example, setting the alarm input to 08:00 and enabling the alarm arms the clock against your local system time. Once the digital clock reaches 08:00:00, the audio synthesizer immediately fires its 800 Hz buzzer for five seconds and provides a snooze option.

All time tracking and sound synthesis execute locally on your device hardware through the Web Audio API. No schedule times, personal alarms, or audio streams transit across any external network.