Is this countdown timer free to use?

Yes. This countdown timer is completely free with no account, login, or installation required. It runs entirely in your browser.

Does the countdown timer stay accurate if I switch to another tab?

Yes. Unlike timers that count interval ticks, this one records the target end timestamp and computes remaining time against the real clock on every update. It snaps back to the correct value the instant you return to the tab, regardless of how long it was in the background.

How do I set a countdown to a specific end time?

Use the End time selectors to choose an hour and minute, then click 'Use target time'. The timer calculates exactly how many seconds remain until that time today (or tomorrow if the time has already passed) and begins counting down.

What is the flip clock display?

The flip clock mode shows digits on split cards that animate like the mechanical departure boards found in classic airports and railway stations (called Solari or split-flap displays). When a digit changes, the top half folds away and the bottom half swings in — a two-part animation that faithfully recreates the original mechanism.

Does the timer make a sound when it finishes?

Yes. When the countdown reaches zero an audio alarm plays using the browser's Web Audio API — no external sound files needed. The screen also flashes red as a visual alert. Both continue until you press Reset.

Can I use this countdown timer for presentations or meetings?

Yes. The remaining time is shown in the browser tab title while the timer is running, so you can monitor it at a glance without switching windows. The flip clock display is also designed for readability at large sizes, making it suitable for projected or second-screen use.

Free Online Countdown Timer

CountdownTimer.co is a free online countdown timer that runs entirely in your browser. No account, no installation, and no subscription required. Set a countdown by duration or by exact target time, choose between a flip clock display or a standard digital display, and receive an audio alarm the moment it reaches zero.

How to use the countdown timer

Use the up and down arrows to set hours, minutes, and seconds, or tap one of the quick preset buttons: 15 minutes, 30 minutes, 45 minutes, or 1 hour. To count down to a specific time of day, use the End time selectors and click Use target time. Click Set to confirm your duration, then click Start or press the spacebar to begin the countdown. Click Pause to freeze it and Start again to resume. When the timer reaches zero, an audio alarm plays and the screen flashes red. Click Reset to silence the alarm.

Flip clock display

The flip clock mode shows digits on split cards that animate like the mechanical Solari split-flap departure boards found in classic airports and railway stations. When a digit changes, the top half folds away and the bottom half swings in, faithfully recreating the original two-part mechanism. The display scales to any screen size and is suitable for projection on a large screen.

Accurate background timing

Unlike timers that count interval ticks and drift when a browser tab is throttled in the background, CountdownTimer.co records a precise target end timestamp and computes the remaining time against the real system clock on every update. The moment you return to the tab, the display snaps to the correct value regardless of how long it was in the background.

Common uses

CountdownTimer.co is used as a kitchen timer, presentation timer, meeting timer, classroom timer, Pomodoro timer, workout rest timer, and event countdown. The remaining time appears in the browser tab title while the timer is running, so you can monitor it at a glance from any window.

Keyboard shortcuts and accessibility

Press the spacebar to start, pause, or resume the timer. When the alarm is sounding, spacebar resets it. The shortcut is inactive when a button, select, or input is focused so it never conflicts with normal keyboard navigation. Day and night colour modes are available and your preference is saved locally for your next visit.

Frequently asked questions

Is this countdown timer free?: Yes. CountdownTimer.co is completely free with no account, login, or installation required.
Does the timer stay accurate in a background tab?: Yes. It uses a wall-clock end timestamp rather than counting ticks, so it self-corrects the moment you return to the tab.
How do I count down to a specific time?: Use the End time selectors to pick an hour and minute, then click Use target time. The timer calculates the exact seconds to that moment automatically.
What is the flip clock mode?: It animates digits like the mechanical split-flap departure boards in classic airports. Each digit flips in two stages as the number changes.
Does the timer make a sound?: Yes. An audio alarm plays using the Web Audio API when the countdown reaches zero. No external sound files are needed.