Does the timer work when I switch to another tab?

Yes. The countdown continues running in the background. The browser tab title updates to show the remaining time (e.g. ⏱ 04:32) so you can glance at it without switching back.

Will the alarm sound if my tab is in the background?

The alarm uses the Web Audio API, which plays through your device speakers regardless of tab focus. Make sure your system volume is on and the mute button in the timer is off.

Does the timer remember my last setting?

Yes. The duration you used last is saved in your browser's localStorage. When you revisit the page, the same time is pre-loaded so you can start immediately.

Can I use this as a Pomodoro timer?

Absolutely. Tap the 25m preset for a standard Pomodoro work interval. After the alarm, tap 5m for a short break. For a full Pomodoro session with automatic phase switching and round tracking, try the dedicated Pomodoro Timer tool.

What is the maximum timer duration?

The maximum is 99 hours, 59 minutes, and 59 seconds — well beyond any practical need. For sessions longer than a few hours, consider setting reminders instead.

30 Minute Timer

Free 30 minute timer with alarm. Great for focused work sessions, workouts, cooking, and study blocks.

Custom Duration

Hours

Minutes

Seconds

Thirty minutes is the universally recommended minimum for daily cardiovascular exercise — the American Heart Association, WHO, and most national health agencies converge on 30 minutes of moderate activity as the threshold for measurable health benefits. It's also the standard Pomodoro long break duration and the minimum effective length for a standup yoga class. In the kitchen, 30 minutes covers most slow-cooked soups, a whole roasted chicken breast, and a batch of cookies from mix to cool. Academic research sessions benefit from 30-minute focused reading blocks followed by 10-minute synthesis pauses. Remote workers use 30-minute "focus blocks" as the scheduling atom — calendars that respect this boundary report less meeting fatigue. For language learners, 30 minutes of daily active practice (not passive listening) is the threshold at which vocabulary retention accelerates meaningfully over time.

Free Online Countdown Timer

Zolkit's countdown timer works entirely in your browser — no install, no account, no ads interrupting your focus. Set any duration from seconds to hours using the input fields, or tap a preset pill (5m, 10m, 25m, 1hr) for the most common intervals. A three-tone alarm sounds when the countdown reaches zero. The tab title updates in real time so you can switch windows without losing track. Your last-used duration is saved locally so the timer is ready to go on your next visit.

Instant Start

Set your time and hit Start — the countdown begins immediately. No sign-up, no ads, no distractions.

16 Preset Durations

One-click presets from 30 seconds to 3 hours cover the most common timer needs: noodles, Pomodoro, workouts, and more.

Audible Alarm

A three-tone ascending chord plays when the timer ends. Mute toggle keeps your environment quiet when needed.

Fullscreen Mode

Expand to full screen for a visible countdown across the room. Ideal for classrooms, kitchens, and group workouts.

Works Offline

All logic runs in the browser. Once the page loads, no network connection is required.

Tab Title Countdown

The browser tab shows the remaining time so you never lose track when working in other windows.

How to Use the Timer

1
Enter hours, minutes, and seconds in the input fields — or tap a preset pill like '5m' or '25m' to load a common duration instantly.
2
Click 'Start' to begin the countdown. The progress ring shrinks from green to red as time elapses. Pause and Resume at any time.
3
When the timer reaches zero, a three-tone alarm sounds and the tab title shows '⏰ Time's Up!'. Click Reset to set a new countdown.