Countdown Timer
Set a countdown timer with quick presets and a beep alarm when it finishes.
A short beep plays when the countdown ends. Keep this tab active for the alert to sound.
Frequently Asked Questions
How do I set a time?
Enter hours, minutes, and seconds, or use a quick preset like 5 minutes or the 25-minute Pomodoro. Press Start to begin the countdown.
Will I hear an alarm?
Yes. When the countdown reaches zero, three short beeps play through your browser audio. The tab must be active and your device sound on for the alert to be heard.
Does it work in the background?
Browsers throttle timers in background tabs, which can delay the alarm. Keep the tab in the foreground for reliable timing and sound.
Is anything sent to a server?
No. The timer runs entirely in your browser.
Related Tools
Stopwatch
Simple online stopwatch with lap tracking and split times.
World Clock
View current time across multiple time zones around the world.
Random Number Generator
Generate random numbers within any range. Multiple numbers at once.
Unit Converter
Convert between hundreds of units: length, weight, temperature, speed, and more.