Online Timer
Set a timer for any length in hours, minutes and seconds. Free online countdown with an alarm, full-screen mode and quick presets. No app or sign-up.
Press Space to start or pause. The timer keeps time in a background tab and beeps when it ends.
A simple timer that just works
Type the hours, minutes and seconds, or pick a quick length from 1 minute to 1 hour, and press Start. The countdown is based on your device's clock, so it stays exact even when the tab is in the background or your computer is busy. When time is up, the timer beeps and the display flashes. Use it for cooking, workouts, study sessions, presentations, classroom activities or game turns.
How to use it
- 1
Set the length
Enter hours, minutes and seconds, or tap a quick length such as 5 min or 30 min.
- 2
Press Start
The countdown begins. Press Pause or the Space bar to stop it for a moment.
- 3
Hear the alarm
The timer beeps when it reaches zero. Press Reset to run the same length again.
Frequently asked questions
Will the timer ring if I switch tabs?
Yes. The online timer keeps exact time from your device's clock, so it stays accurate in a background tab and beeps when it reaches zero. The remaining time also shows in the tab title.
Why didn't I hear the alarm?
Check that your device isn't muted and the volume is up. On iPhone, the ring/silent switch can also silence web pages.
Can I pause and resume?
Yes. Press Pause (or the Space bar) and Resume to carry on from where you stopped. Reset starts the countdown again from the full length.
What is the longest timer I can set?
Up to 99 hours, 59 minutes and 59 seconds. For a countdown to a date, such as a birthday or holiday, use the Countdown Timer.