Online Countdown Timer

What this page does

The dial is the whole point: set hours, minutes and seconds directly on it, or type a number and press Enter — the arrow keys nudge the value up or down first, if you want to adjust it before starting.

The countdown runs entirely in your browser. No account, no upload, no server round-trip — closing the tab simply ends it, and reopening it starts fresh.

Why it stays accurate even in the background

Browsers deliberately slow down timers running in a tab you’re not looking at, to save battery. This one doesn’t fight that: it records the exact moment you pressed start and works out the remaining time against the real clock on every frame, so a throttled background tab simply catches up the instant you switch back to it.

The same thing happens, more sharply, if the device itself sleeps — nothing can run while it’s suspended, so the display and the alarm both update the moment you wake it, based on what the real clock says should have already happened. The one casualty of that is the alarm sound itself: a fully suspended browser can’t play audio at all, so a countdown that finished while your phone was locked will ring the instant you unlock it, not at the exact second it reached zero.

Sound is the other part a page can’t fully control on its own — most browsers block audio until you’ve interacted with the page at all, which is why pressing start is also what unlocks the alarm tone.

Making it your own

The design panel next to the dial changes how the countdown looks and how it gets your attention — never how long it actually runs.

• Face — eight styles: a gradient arc, a circular progress ring, LED-style digits, a flip clock, neon glow, a horizontal bar, a dotted circle, and a plain minimalist number.
• Colour — any accent you like, applied to whichever face you’ve picked.
• Sound — fifty alert tones, from a plain beep to bells, chimes and a siren. Every one is synthesised in the browser using the Web Audio API rather than played from a sound file, so nothing downloads and there is no licence to worry about.
• What happens at zero — a repeating alarm, a single chime, a vibration on a phone that supports it, or silence with just the display changing.
• Full screen — for a spare monitor, a projector, or simply a bigger number visible across a room.
• A label — name the timer, which helps once you’re running more than one for different things.

Your face, colour and tone choices are remembered on this device, so they’re already set the next time you come back.

A duration timer, not a countdown to a date

This page counts down a length of time you set right now — ten minutes, ninety seconds, three hours. It has no idea what today’s date is and doesn’t need to.

If what you actually want is a countdown to a fixed point on the calendar — a birthday, a holiday, a launch date — that’s a different kind of tool, working from a date rather than a duration. The next birthday countdown and the event countdowns both do that, and roll forward to the next occurrence on their own once the date passes.

Where a plain countdown actually gets used

A plain countdown turns up in more places than the name suggests:

• Cooking and kitchen tasks that go wrong if they run a minute long — the cooking timer has presets built in if you’d rather tap a dish than set a number yourself.
• Workouts and interval training — a round, a hold, a rest, timed and visible without breaking form to check a watch.
• Timeboxing a piece of work or an exam question, where the study, exam and Pomodoro timers add real structure once one plain countdown alone stops being enough.
• Keeping a talk, a Q&A or a meeting agenda item to length — full screen, on a shared display, so the whole room can see it running down rather than just the speaker.
• Classroom activities: a timed group task, a quiz round, or a clean, visible cut-off between one activity and the next.
• A short, deliberate break — five minutes away from a screen, or a stretch between two longer tasks.
• Any turn-based challenge or game where a visible countdown is the whole mechanic.

Popular lengths, and everything else on the site

The lengths people set most often sit just below the dial, and each one has its own page you can bookmark, share, or pin as a shortcut — the full range runs from one minute up to a hundred, one page per length.

For anything this page doesn’t cover directly, the full list of tools on the site includes a stopwatch, an alarm clock, breathing and meditation timers, a world clock and time zone converter, sunrise and sunset times, prayer times and Ramadan, and a set of calculators for age and birthdays.