Countdown Timer
Set a timer and get a sound, title flash, and (if allowed) a browser notification when it's done.
Last updated
How to set an online timer
- Tap a quick preset to start straight away, or type the minutes and seconds.
- Click Start. Use Pause and Reset as needed.
- When time is up you hear a tone, the tab title flashes and, if you allowed it, a notification appears.
About this tool
The countdown tracks a real end timestamp rather than just decrementing a counter each second, so it stays accurate even if the tab is backgrounded or the browser throttles timers for a while. When it reaches zero it plays a short tone, flashes the browser tab's title, and — if you've granted permission — shows a system notification, so you don't have to keep the tab in view.
Nothing here is sent to a server — the entire timer runs as JavaScript in your browser tab, and stops if you close the tab.
Questions about the timer
Will the timer still go off if I switch tabs?
Yes. It counts down to a fixed end time, so it stays accurate in the background, and the tone, flashing tab title and notification tell you when it’s done.
How do I get a notification when it ends?
Allow notifications when your browser asks. Without permission you still get the sound and the flashing tab title.
Does it work if I close the tab?
No. The timer runs in the page, so keep the tab open, even in the background.
Can I use it for cooking or the gym?
Yes. It works on phones too; for repeated work and rest periods, the Pomodoro timer cycles automatically.