What is the Online Alarm Clock?
The online alarm clock rings at the time you choose, with a label such as "Call client" or "Take medicine". It is perfect at a computer when your phone is out of reach. Choose a sound, test it, and keep the tab open.
To count down a duration rather than a clock time use the Online Timer; to find what time it will be after a number of hours use Hours From Now.
How to use the Online Alarm Clock
- Set the alarm time.
- Add an optional label.
- Choose a sound and test it.
- Press Set alarm and keep the tab open.
Example
Set 15:30 with the label "Zoom call" and the alarm rings at 3:30 pm with the label shown on screen.
Tips for reliable alarms
- Keep the tab open and the volume on.
- On phones, keep the screen on or use the phone's own alarm for waking up.
- Test the sound once after setting the alarm.
- For a meeting abroad, convert the time first with the Time Zone Converter.
Online alarm vs phone alarm
A phone alarm is best for waking up because it works when the phone is locked. The online alarm clock is best for reminders while you work on a computer, in a classroom or in an office where you want a visible label on the big screen.
More free date and time tools
Planning around dates usually needs more than one answer. These related tools work the same way, instantly in your browser and free:
- Days until any date: count down to an exam, trip or deadline.
- Date calculator: add or subtract days, weeks, months or business days.
- Date difference calculator: the exact time between two dates.
- Age calculator: your exact age in years, months and days.
- Time zone converter: the same moment in Pakistan, the Gulf, the UK and the USA.
- Online timer: a countdown with an alarm sound.
Frequently asked questions
Will the alarm work if I close the tab?
No. Keep the tab open for the alarm to ring.
Can I set more than one alarm?
Set one alarm at a time; you can set a new one after it rings.
Does it work on mobile?
Yes, as long as the screen stays on and the browser is open.
Is there a snooze option?
Yes, snooze for 5 minutes.
Which time zone is used?
Your device's local time.
Is the Online Alarm Clock free to use?
Yes. The Online Alarm Clock on Custom Converter is completely free, with no sign-up, no daily limit and no watermark.
Does the Online Alarm Clock work on mobile phones?
Yes. It is built mobile-first and works on Android phones, iPhones, tablets and computers in any modern browser, with no app to install.