Free countdown timer. Set any duration and get a sound alert when time is up.
Free Online Countdown Timer
Set-Timer.com's countdown timer lets you set any duration from seconds to hours. Simply enter your hours, minutes, and seconds, press Start, and the timer counts down with a sound alert when it reaches zero.
How to Use the Online Timer
Enter your desired time in the hours, minutes, and seconds fields, then press Start. The timer counts down and plays an alert sound when it reaches zero. Press Pause at any time, and Resume to continue. Use the Loop option to automatically restart the timer after it finishes — perfect for interval training or repeated tasks. Enable browser notifications to get a pop-up alert even when you've switched to another tab.
Uses for a Countdown Timer
Countdown timers are used for cooking, studying, workouts, classroom activities, meetings, presentations, and any task where you need a time limit. The fullscreen mode makes this timer ideal for classroom display on a projector or TV.
Frequently Asked Questions
How do I set the online timer?
Enter your desired time in the hours, minutes, and seconds fields at the top of the timer, then press the Start button. The timer will count down and play a sound when it reaches zero.
Will the timer alert me if I switch tabs?
Yes. The timer continues running in the background when you switch tabs. The remaining time is shown in your browser tab title, and if you enable browser notifications, you'll receive a pop-up alert when time is up.
Can I loop the timer automatically?
Yes. Enable the Loop toggle and the timer will automatically restart from the beginning when it reaches zero — useful for interval training, cooking multiple batches, or any repeated timed task.
Is this timer free?
Yes, completely free. No sign-up, no download, no subscription required.