Online Timer

Set a timer online instantly.
Use it as a countdown timer for minutes or hours with sound alerts.

⏰ Time's up!
Your timer has finished.
05:00.00
Set Duration
h
:
m
:
s
Quick Timers
Timer Sound
soft & clear
Sonarclassic ping
Birdsnature sounds
Chimesoft chime
How to use this online timer
1
Enter a duration using hours, minutes, and seconds — or pick a quick timer preset.
2
Press Start to begin the countdown. Use Stopwatch mode to count up from zero.
3
Keep the tab open and your volume up — an alarm will sound when your timer finishes.

Free Online Countdown Timer & Stopwatch

Set a timer online in seconds with AlarmO'Clock. Choose any duration — from a few seconds to hours — or start instantly using one of the quick timer presets. When the countdown ends, you’ll hear an alert sound, and you can easily add extra time if needed.

Switch to stopwatch mode to track elapsed time and record lap splits. Perfect for workouts, cooking, study sessions, presentations, or any task where precise timing matters.

Go directly to a specific timer:

1 minute timer 5 minute timer 10 minute timer 30 minute timer 45 minute timer 1 hour timer