Countdown Timer

    Free online countdown timer with fullscreen mode. Perfect for studying, cooking, workouts, and presentations.

    05:00

    Set Time

    Hours

    :

    Minutes

    :

    Seconds

    Press Space to start/pause

    Read the complete guide for in-depth tips and troubleshooting.

    What Is a Fullscreen Countdown Timer?

    A fullscreen countdown timer shows large, readable time remaining for exams, workouts, presentations, and events. Everyone in the room can see it without squinting at a phone. Free, browser-based, and customizable duration.

    How to Use the Countdown Timer

    1. Set minutes and seconds for your session
    2. Start the countdown and enter fullscreen
    3. Connect a projector or second monitor if needed
    4. Wait for the alert when time reaches zero
    5. Reset for the next round

    Countdown Timer Scenarios

    Classroom exams

    Visible time for all students

    Fitness intervals

    Rest periods between sets

    Presentations

    Speaker time limits

    Cooking

    Hands-free kitchen timing

    Meetings

    Keep discussions on schedule

    Game nights

    Turn timers for board games

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    Frequently Asked Questions

    How do I use the countdown timer?

    Set your desired time using the hours, minutes, and seconds inputs, or click one of the preset buttons (1 min, 5 min, etc.). Then click Start. The timer counts down and shows a 'Time's up!' alert when it reaches zero. Click the fullscreen button for a distraction-free experience.

    Can I pause and resume the countdown timer?

    Yes. Click Pause at any time to freeze the timer, then Resume to continue from where you left off. Click Reset to return to the original time and start over.

    Does the countdown timer work in fullscreen?

    Yes. Click the fullscreen icon to enter fullscreen mode. The timer continues running with a large circular display. Click anywhere or press ESC to exit fullscreen.

    What is the maximum time I can set?

    You can set up to 23 hours, 59 minutes, and 59 seconds. For most use cases like studying, cooking, or presentations, the preset buttons cover the most common durations from 1 minute to 1 hour.

    Does the timer make a sound when it finishes?

    The timer displays a visual 'Time's up!' alert with a red pulsing animation when it reaches zero. Browser security restrictions prevent automatic sounds without user interaction, but the visual alert is clearly visible even in fullscreen mode.