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    12 Hour Timer

    Perfect for overnight periods, extended work sessions, or half-day activities. Starts immediately and alerts you when complete.

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    12 hour Timer FAQ

    How do I start the 12 hour timer?

    The 12 hour timer starts automatically as soon as the page loads. You can pause it at any time, then press Resume to continue, or Reset to start a new 12 hour countdown.

    Will the 12 hour timer alarm sound when I'm on another tab?

    Yes. The browser will play the alarm sound when the 12 hour countdown reaches zero, even if the tab is in the background. Make sure your device volume is on and the tab is not muted.

    What is a 12 hour timer good for?

    A 12 hour countdown is great for naps, study marathons, slow cook recipes, or work shifts. It is a quick way to time-box an activity without juggling a stopwatch app or phone alarm.

    Is this 12 hour timer free to use?

    Yes — the 12 hour timer is 100% free, requires no signup, and works in any modern web browser on desktop or mobile.

    Set the timer for the specified time

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