This free online alarm clock runs entirely in your browser. Set the time, choose a sound and click Set Alarm. Keep the tab open and the alarm will play at the set time. Works on desktop and mobile — no download or app needed.
Frequently Asked Questions
Does the tab need to stay open?
Yes — the alarm runs in your browser tab, so it must stay open (but can be in the background). If you close the tab, the alarm will not fire. For phone alarms, use your device's built-in clock app.
Why didn't the alarm sound?
Browsers require a user interaction (like clicking a button) before playing audio. If you set the alarm without clicking anything first, the sound may be blocked. Try clicking the Set Alarm button, then wait for it to fire.
Can I set multiple alarms?
Yes — set multiple alarms in a row and they all appear in the Upcoming Alarms list below the clock.