Online Countdown Timer
Set any duration in hours, minutes and seconds, then press Start to count down to zero. When the timer reaches zero it flashes red and plays an alert sound so you never miss the finish. Use the quick presets — 1, 5, 10, or 25 minutes — for the most common durations, or enter a fully custom time.
How to Use the Countdown Timer
Enter hours, minutes, and seconds in the fields above, or tap a preset button. Press Start to begin counting down. Press Pause to hold the timer at its current value, and Reset to return to your chosen duration. The timer keeps counting accurately using your device's clock even if you switch to another browser tab.
Common Uses
Cooking and baking, presentations and speeches, exam practice, meditation and breathing exercises, timed breaks during work or study, board game turns, and workout rest periods all work well with a simple countdown timer.
Tips for Timed Tasks
For recurring tasks like tea steeping or a Pomodoro focus block, keep the tab open and use the keyboard shortcuts: press Space to start or pause and R to reset, so you can control the timer without touching the mouse.
Staring at a screen for a while? Set a 20-minute countdown and, every time it goes off, look at something roughly 20 feet away for 20 seconds. It's a simple habit eye doctors recommend for reducing digital eye strain — and this timer makes it easy to actually stick to.
Tips & Tricks
Box breathing before high-stakes moments. Set the timer to 4 seconds and cycle it four times in a row — inhale, hold, exhale, hold — a technique used by athletes and even Navy SEALs to stay calm under pressure.
Rehearse speeches with a buffer. If you have 5 minutes on stage, practice against a 4:30 countdown so you naturally build in room to breathe, pause, and not run over.
Run several timers at once. Open the page in multiple tabs to track more than one dish cooking simultaneously — each tab keeps its own independent countdown.
Did you know? The dramatic "T-minus" countdown to launch wasn't invented by NASA — it first appeared in the 1929 German silent film Frau im Mond (Woman in the Moon), decades before it became standard practice at mission control.
Frequently Asked Questions
Does the countdown timer work in a background tab?
Yes. The timer calculates remaining time from your device's clock, so it stays accurate even if the browser tab is inactive or minimized.
Can I set a countdown longer than an hour?
Yes. Enter any number of hours up to 99, plus minutes and seconds, for durations well beyond an hour.
Will the timer alert me with sound?
Yes. When the countdown reaches zero, the screen flashes and a short audio alert plays automatically.