Online timer
A countdown timer with a beep at zero
Set the minutes and seconds, then press Start. Or open a preset that is ready to go.
Ready. Press Start.
Preset timers
Each opens ready to start, on its own page you can bookmark.
Quick set on this page
Using the timer
Set the minutes and seconds and press Start. The timer counts down, shows the time left in the browser tab title so you can work in another tab, and plays three short beeps at zero. Pause holds the time where it is and Reset goes back to the full duration. The longest timer is 5,999 minutes, just under 100 hours.
Sound
The beep is generated by your browser at that moment; there is no audio file to load. Browsers only let a page make sound after you have interacted with it, so the alarm is armed when you click Start. Check that the device volume is up and the tab is not muted. A phone switched to silent may stay silent. Untick "Beep at zero" for a silent timer.
Accuracy
The finish time is fixed when you press Start, and each tick compares it with your device's clock. Browsers slow down background tabs, so the display may update less often there, but the timer does not drift. If a computer goes to sleep, or a phone locks its screen and suspends the browser, the beep cannot sound until the device wakes. Keep the screen on for anything that matters, and do not rely on a web page for medication or safety timing.
Presets
The common lengths have their own pages that open ready to start. For other lengths, use the quick-set buttons or type the time. Nothing is stored, so a reload returns the page to five minutes.