Online Timer – Free Countdown Timer

This free online timer counts down to zero and sounds an alarm when your time is up. Choose a quick preset or set any duration you like in hours, minutes, and seconds. It works as a 5 minute timer, a 10 minute timer, a 15 minute timer, a 20 minute timer, or a 30 minute timer in one click — and just as easily as a 1 minute timer, a 45 minute timer, or a 1 hour timer. It is built for studying and focus sessions, cooking and workouts, presentations, games, and any moment you need a simple countdown you can trust. Everything runs in your browser, with no sign-up and nothing to install. Pick a preset or set your time above to start the countdown.

What does this tool do?

It is a full-screen countdown timer with an alarm:

• One-click presets for common lengths: 1, 5, 10, 15, 20, 30, and 45 minutes, and 1 hour.
• Custom durations set in hours, minutes, and seconds.
• A large, easy-to-read display with a visual progress ring.
• An alarm sound when time is up, plus a flashing browser tab so you notice even in another window.

Why use this timer?

A good timer keeps you on track without getting in the way. This one is accurate because it counts down against your device's clock rather than guessing frame by frame, so a 10 minute timer really lasts ten minutes even if the tab is busy. The big display is readable from across a room, the alarm makes sure you do not miss the finish, and the presets mean you can start a 5 minute timer or a 20 minute timer instantly without typing anything.

How the tool works

• When you start, the timer records the exact end time from your device's clock and counts down to it, staying accurate throughout.
• The progress ring empties as time passes, giving you an at-a-glance sense of how much is left.
• At zero, an alarm plays using your browser's built-in audio — there is no sound file to load.
• You can pause and resume at any time, or reset back to your chosen duration.

How to use the tool

Popular timer lengths

Some of the most common ways people use this tool:

• 5 minute timer — short breaks, quick tasks, and warm-ups.
• 10 minute timer — focused work bursts, meditation, and tidying up.
• 15 minute timer — study blocks, reading, and cooking.
• 20 minute timer — power naps, exercise circuits, and chores.
• 30 minute timer — deep work, workouts, and revision sessions.
• 1 hour timer — long study or work sessions and slow cooking.

Common use cases

• Studying: focus sessions and timed breaks, such as the Pomodoro method.
• Cooking & baking: a reliable kitchen timer with an alarm.
• Workouts: timing rounds, rest periods, and stretches.
• Presentations & meetings: keeping to a set time.
• Games & classrooms: giving everyone a clear, visible countdown.

Tips & best practices

• Keep the tab open so the alarm can sound; the flashing tab title helps if you switch away.
• Use presets for speed and the custom boxes for anything in between, like a 12 or 25 minute timer.
• Pair a work timer with a shorter break timer for a simple focus routine.
• The first tap enables sound in your browser, so the alarm is ready when the countdown ends.