Free Online Countdown Timer with Alarm

Set any duration from one second to twenty-three hours and fifty-nine minutes. Use the intuitive up/down arrows to dial in hours, minutes, and seconds, or tap a quick preset button for common durations like 5, 10, 15, 25, or 30 minutes.

Alarm Sounds and Notifications

Choose from fifteen unique alarm tones — all synthesized in your browser with zero file downloads. Options range from a classic bell and gentle chime to meditation bowl, ocean wave, xylophone, and retro game sounds. Enable browser notifications to get alerted even when the timer tab is in the background.

Advanced Features

Enable the last-10-second countdown tick for an audible alert as your timer approaches zero. Turn on “Count up” in Preferences to keep tracking overtime after the countdown finishes — perfect for knowing exactly how long past a deadline you have gone. The repeat toggle automatically restarts your timer, ideal for interval-based activities.

Popular Timer Presets

Quick-start any of these common countdown durations: 1 minute timer, 3 minute timer, 5 minute timer, 10 minute timer, 15 minute timer, 25 minute timer, 30 minute timer, or 1 hour timer.