Countdown Timer
Count down to your target time
Hours
Minutes
Seconds
What is a Countdown Timer?
A countdown timer is an online tool that counts down from a set time to zero. Whether you need to time cooking, exercise routines, study sessions, or presentations, you can use it directly in your browser without installing any app.
The circular progress bar gives you a visual representation of the remaining time, and an alarm sound plays when the timer finishes so you never miss a deadline even while multitasking.
How It Works
The countdown timer calculates the difference between target and current time in milliseconds, converting to days/hours/minutes/seconds for display. It updates every second (or more frequently) via setInterval or requestAnimationFrame, using the Performance API for accurate timing. Notification features are implemented via the Notification API.
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