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Online Countdown Timer with Alarm
Free online countdown timer. Set hours, minutes and seconds, start right away and get an alert sound when time is up, all in your browser.
Run it in your browser
Free · no sign-up · files stay on your device
Everything runs in your current browser. Selected files and text are not sent to our servers. Some tools download a small engine the first time you run them.
Launch the toolHow to use it
- Set the hours, minutes and seconds.
- Press Start to begin the countdown.
- When it ends, check the alert and completed state, then reset if you need another round.
Frequently asked questions
Does the timer ring if I close the tab?
No. The current version works only in an open browser tab.
What if I hear no sound?
Check your device volume and whether the browser tab is muted. In a background tab, the alert may be delayed by browser or device policy.
How long can I set it for?
From 1 second up to 23 hours 59 minutes 59 seconds.
Is anything uploaded?
No. The timer runs entirely in your browser.