Free Online Countdown Timer — Full Screen & Offline
The OnlineTimeZone countdown timer is built for focus sessions, classroom management, presentations, cooking, workouts, and any task where precision timing matters. Set hours, minutes, and seconds — then watch the animated circular progress ring count down in real time. Expand to full screen mode for classrooms and presentations.
Frequently Asked Questions — Countdown Timer
You can set up to 99 hours, 59 minutes, and 59 seconds — giving you a maximum countdown of nearly 100 hours. This makes it suitable for everything from quick 30-second intervals to multi-day event countdowns. Simply enter your desired hours, minutes, and seconds in the input fields and press Start.
Yes. The Start button becomes a Pause button once the timer is running. Click Pause to freeze the countdown at its current value, then click Resume to continue from exactly where it left off. The circular progress ring also pauses and resumes along with the timer, giving you a clear visual indicator of remaining time.
Yes. Click the expand icon in the top right corner of the Timer section to enter full-screen mode. The timer display scales up to fill your entire monitor — ideal for teachers managing classroom activities, gym instructors running interval sessions, or anyone presenting to an audience who needs to see the timer clearly from a distance.
Yes. When the countdown reaches zero, a modal popup appears and the alarm sound plays automatically. The sound type and volume are controlled by your Settings — choose from Chime, Digital Beep, or Siren. Click Dismiss to stop the sound. The timer resets automatically after finishing so you can start a new countdown immediately.
Absolutely. The Pomodoro technique involves 25-minute focused work intervals followed by 5-minute breaks. Set the timer to 25:00, work until it rings, then reset and set 05:00 for your break. The visual progress ring makes it easy to gauge how much of your Pomodoro session remains without having to check the exact time.