Countdown Timer

Count down to a date, or run a timer with an alert.

Countdown to

Minutes

Play a sound when it finishes

The countdown is calculated from the actual clock rather than by counting ticks, so it stays accurate even when the tab is in the background and the browser throttles timers.

What does Countdown Timer do?

Count down to any future date and time with a live display of days, hours, minutes and seconds, or run a simple duration timer with a sound alert. Both keep accurate time even if the tab is backgrounded.

How to Use Countdown Timer

1
Choose a modeA target date, or a duration.
2
Set the targetPick a date, or tap a duration preset.
3
StartThe countdown runs live.

Key Features

Count down to a specific date and time, or run a duration timer
Live days, hours, minutes and seconds display
Optional sound alert and browser notification when it finishes
Accurate in background tabs, because it uses wall-clock time rather than tick counting
Quick presets: 1, 5, 10, 15, 30 and 60 minutes
Full-screen mode for presentations and classrooms

Frequently Asked Questions

Does the timer keep running if I switch tabs?

Yes. Browsers throttle timers in background tabs, so this one calculates from the actual clock time rather than counting ticks. Come back after ten minutes and it shows the correct remaining time.

Will it alert me when it finishes?

It plays a sound, and can show a browser notification if you grant permission. Notifications need the permission prompt accepted first, which the tool asks for only when you enable the option.

Which time zone does a target date use?

Your local zone, since that is what a countdown to a personal deadline means. For an event in another zone, use the time zone converter first to find the equivalent local time.