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 Second Timer

Free online 30 second timer with alarm. Starts instantly in your browser. Perfect for quick tasks, breath holds, and timed intervals.

Custom Duration

Hours

Minutes

Seconds

A 30-second timer is surprisingly versatile. Athletes use it for high-intensity interval training (HIIT) rest periods between bursts. Public speakers practice 30-second elevator pitches. Breath-hold enthusiasts time their static apnea attempts. In the kitchen, a half-minute is the ideal window for softening butter in the microwave without melting it — power level matters, but 30 seconds is the magic number. Meditation teachers recommend 30-second micro-pauses between tasks to reset mental focus. Programmers use it to enforce a "think before you type" rule to reduce debugging time. Whether you're counting down a penalty shootout or timing a quick stretch between work sessions, a clean 30-second countdown keeps you precise without the overhead of a full minute.

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.