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When you set and start a timer, its settings (message, sound) for that duration are saved automatically. Your saved timers appear here. Click one to activate it with one click.
Use this free online timer for 16 seconds. The countdown is ready to start with one click. {startTimerCta} A 16 seconds timer is useful for short countdowns, drills, or quick tasks. When the countdown reaches zero, the alarm will sound. Use the Label and Sound rows on the widget to change the alarm sound and message; keep the page open until the timer rings. Use the toolbar to zoom or fullscreen.
This page is pre-set to 16 seconds. Start the countdown with one click.

This timer runs directly in your browser with no app or account required. Use it for quick countdowns, reaction drills, short exercises, or fast checks. Alarm settings are saved for future use.
Need to set an alarm? Use the main Online Alarm Clock. Need a different countdown? Try the main Online Timer. Want to measure elapsed time? Use the Online Stopwatch. Need to count clicks or events? Try the Online Counter. Want to check the current time? See the Online Clock.
This page is already set for 16 seconds. Use the Label and Sound rows on the widget to choose a sound and message if you like, then click "Start timer" to begin. Keep the tab open; when time is up, the alarm will sound.
The countdown only runs while the page is open. Keep the tab active so it can ring when it reaches zero. Closing the tab or device sleep will stop it. Test before use and check volume; on mobile, keep the page in the foreground.
Yes. Use the Label and Sound rows on the widget to add a message and choose a ringtone. Settings are saved when you start the timer.
Yes. Sound and message are saved per duration. Last-used timers appear in "Saved timers". Each timer page has its own URL—bookmark it and your settings load with one click. For multiple timers, open different durations in separate tabs.