Countdown Timer
Set a countdown for any duration and get notified the moment it ends.
What is it?
A **countdown timer** counts down from a time you set — hours, minutes, and seconds — and alerts you when it reaches zero. Unlike a stopwatch that measures elapsed time, a countdown timer tells you how much time remains. This makes it the perfect tool whenever you need to stay aware of a deadline, a cooking window, a meeting slot, or a timed task. Online countdown timers are one of the most searched tools on the internet, and for good reason: they are universally useful. You can use one in the kitchen to avoid overcooking pasta, at your desk to enforce focused work blocks, in the classroom to manage group activities, or at an event to count down to a presentation start. The use cases are genuinely endless. This free, browser-based timer requires no download, no app, and no account. Set your time, hit start, and work. An audible alert will fire when the countdown reaches zero — even if you have switched tabs — so you never have to keep checking the screen.
How to use it
- Enter the hours, minutes, and seconds you want to count down from.
- Click "Start" to begin the countdown.
- Use "Pause" to pause and "Resume" to continue from where you left off.
- Click "Reset" to return to your original time without starting again.
- When the timer reaches zero, an audio alert will play and the timer will flash.
Why use this tool
A phone timer works fine until your phone is needed for something else. A desktop app requires installation. Searching for a timer online usually lands you on sites with distracting ads and tiny controls. This timer is built to be distraction-free: large readable digits, a single-click workflow, and an alarm that works even when the tab is in the background. Whether you are a student using the Pomodoro technique, a chef timing multiple dishes at once, a teacher running a quiz, or simply someone who needs 20 minutes to focus — this tool handles it without friction. Bookmark it once and you will always have a clean, reliable timer at hand.
Frequently asked questions
Will the alarm sound if I switch to another tab?
Yes. The timer continues running in the background even if you switch tabs or minimise the browser. The audio alert will fire when the countdown ends regardless of which tab is active.
What is the maximum time I can set?
You can set up to 99 hours, 59 minutes, and 59 seconds — that is nearly 100 hours of countdown time.
Can I set multiple timers at once?
You can open multiple browser tabs, each with its own countdown. Each tab runs independently.
Does the timer work without an internet connection?
Once the page has loaded, the timer runs entirely in your browser using JavaScript and does not require an active internet connection.
Can I use this as a presentation timer?
Absolutely. Set the duration of your talk, go fullscreen (press F11 in most browsers), and the large digit display makes it easy to monitor time remaining from across the room.