Online Alarm Clock
Set a free alarm directly in your browser. Choose a time, give it a label, and keep this tab open — you'll get a sound alert and, if you allow it, a browser notification when it goes off.
Keep this tab open for the alarm to ring — browsers can't fire sound while a tab is fully closed.
Clock change guides
- What Is Daylight Saving Time (DST)? A Plain-English GuideWhat daylight saving time is, how it works in the UK, Europe and the US, why it exists, its history, who uses it and the argument over scrapping it.
- Why Do the Clocks Go Back in October? The Real ReasonThe clocks go back in autumn to return the UK to GMT, so winter mornings are lighter. The history, the rule, what time it happens and what changes for you.
- When Do the Clocks Go Forward Again After Going Back?When the UK clocks go forward again after the autumn change, how long the UK stays on GMT, when evenings get lighter and how to remember to reset your clocks.
Frequently asked questions
Do I need to install an app to use this alarm?
No — the alarm runs entirely in your browser tab using the Web Audio API, so there's nothing to install and no account to create.
Will the alarm still ring if I close the tab?
No, the tab needs to stay open (it can be in the background) for the alarm to trigger its sound and notification at the set time.
Can I set more than one alarm?
Yes — add as many alarms as you need, and toggle each one on or off individually without deleting it.
Does the alarm use my time zone?
Yes, it uses your device's local clock and time zone, so the time you set is the time it will ring in wherever you are.