ONLINE ALARM
Set an alarm for any time. Keep this tab open and we'll alert you.
Alarm clock picks
For waking up without your phone.
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ONLINE ALARM ONLINE
Setting an alarm should take two taps, not a trip to the app store. This online alarm lets you pick a time and walk away. When that moment arrives, a sound plays through your browser regardless of which tab you are viewing. Unlike phone alarms that require unlocking the device and navigating through clock apps, this runs entirely in your browser window. Parents use it for after-school pickup reminders. Home cooks set alarms for oven timers when their phone timer is already running a different countdown. Office workers set hourly hydration or posture-check reminders without installing productivity software. The alarm is generated through Web Audio API, which means it plays through your active audio output including Bluetooth speakers and headphones. There is no signup, no notification permission prompt on first visit, and no data stored on any server.
How It Works
Select your alarm time using the hour and minute controls. The alarm calculates the gap between now and your target time using the system clock. When the target moment arrives, a tone plays through Web Audio API and a visual alert appears on screen. You can dismiss the alarm with a single tap. If you need to cancel before it fires, press the cancel button. The page must remain open in a browser tab for the alarm to trigger.
When to Use This Timer
Set an online alarm as a backup wake-up call when traveling without a phone charger. Use it during cooking when your phone timer is occupied by another countdown. Office workers set hourly reminders for stretching, hydration, or meeting prep. Students set study block alarms to enforce break schedules during exam preparation.
When Your Phone Timer Is Already Busy
Most people have experienced the frustration of needing a second timer while the first is still counting down. Phone operating systems handle multiple timers awkwardly, burying them in nested menus. A browser-based alarm runs independently of your phone clock app, giving you a parallel timing channel without installing anything.
Frequently Asked Questions
Will the alarm sound if my browser is minimized?
On desktop browsers, yes. The alarm uses Web Audio API which continues playing in background tabs. On mobile browsers, behavior varies: Android Chrome typically plays background audio, while iOS Safari may pause if the tab is inactive for extended periods.
Can I set multiple alarms at the same time?
This page supports one alarm at a time. For multiple simultaneous alarms, open additional browser tabs with this page and set each one independently. Each tab operates its own alarm clock.
Does the alarm use my local time zone?
Yes. The alarm reads the system clock from your device, which uses whatever time zone your operating system is configured to. If you travel across time zones, your device clock adjusts and the alarm follows.
What sound does the alarm make?
The alarm generates a clear, rising tone through Web Audio API. The tone is designed to be noticeable without being jarring, playing at your device current media volume level.
Will the alarm work if I lose internet connection after loading the page?
Yes. Once the page loads, the alarm runs entirely in your browser with no further server communication needed. The JavaScript and audio generation are self-contained on the page.
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How to Set an Alarm Online in Three Steps
To set an alarm here, choose the hour and minute with the time controls, press Set Alarm, and leave this tab open. When your time arrives, a tone plays and an alert appears on screen. Press Dismiss to stop it, or Cancel Alarm if you change your mind before it rings.
Quick examples of the wait time
The alarm counts the gap between the current time and the time you pick. These examples show how long the tab has to stay open.
| Current time | Alarm time | Wait |
|---|---|---|
| 6:45 AM | 7:30 AM | 45 minutes |
| 9:10 AM | 10:00 AM | 50 minutes |
| 12:05 PM | 1:45 PM | 100 minutes (1 hour 40 minutes) |
| 1:15 PM | 3:00 PM | 105 minutes (1 hour 45 minutes) |
| 2:40 PM | 3:15 PM | 35 minutes |
Tips before you rely on it
- Run a short test. Set an alarm two minutes ahead, press Set Alarm, and listen. This confirms the sound reaches your speakers or headphones.
- Check the volume first. The tone plays through your active audio output, so make sure the right device is selected and not muted.
- Keep the tab open. Closing it cancels the alarm. Pin the tab or move it to its own window so you do not close it by accident.
- Keep the device awake. If your computer or phone goes to sleep, the browser may pause the page. Adjust your screen and sleep settings for the wait.
- Double-check AM and PM. A wrong setting is the most common reason for an alarm at an unexpected hour. Read the time again before you walk away.
- Use one tab per alarm. If you need a second time, open this page in another tab and set it there.
Short waits, like the 35-minute example above, are the easiest way to get used to the tool. Once you have heard the tone and dismissed it once, longer alarms are easy to trust.
How can I check that the alarm will be loud enough before I leave it running?
Set a test alarm two minutes from now, press Set Alarm, and wait for the tone. Adjust your device volume and audio output until it is clear, then set the real alarm.