Countdown Timer

Quick answer: Countdown Timer is a free online tool that lets you set any duration in hours, minutes and seconds and get an audible alarm when time runs out. This free countdown timer online needs no signup and runs entirely in your browser. No account or install needed — it runs entirely in your browser, free.

Set any duration in hours, minutes and seconds and get an audible alarm when time runs out. This free countdown timer online needs no signup and runs entirely in your browser.

What is the Countdown Timer?

A countdown timer online counts down from a duration you set and alerts you when it reaches zero — perfect for cooking, workouts, exams, meetings and presentations. Set hours, minutes and seconds, press start, and a clear alarm sound plays the moment your time is up.

Unlike a phone alarm buried in menus, this timer lives in a browser tab with a big readable display and a progress bar that shows at a glance how much time remains. You can pause and resume mid-countdown, or reset and reuse it instantly for repeated intervals like steeping tea, timing HIIT rounds or running classroom activities.

The alarm is generated with WebAudio directly on your device, so it works offline once the page is loaded and needs no downloads. It is free forever with no signup, and because timing is based on your device clock, the countdown stays accurate even if you switch to another tab while it runs. From steeping the perfect cup of tea to keeping a keynote within its slot, a reliable countdown removes the need to watch the clock — the alarm watches it for you.

How to use the Countdown Timer

  1. Enter your duration using the hours, minutes and seconds boxes — for example 0 hours, 25 minutes, 0 seconds for a Pomodoro-style block.
  2. Press Start to begin the countdown. The display ticks down and the progress bar shrinks as time passes.
  3. Press Pause any time to freeze the countdown, then Start again to resume exactly where you left off.
  4. When the timer hits zero you will hear an alarm sound and see a clear ‘time is up’ message.
  5. Press Reset to return to your original duration and run the same countdown again, or type a new duration first.

Countdown Timer use cases

Cooking and baking

Pasta, roasted vegetables, rising dough — set a countdown per dish and let the alarm pull you back at the right moment instead of hovering by the oven. Overlapping dishes are easy: note each dish’s remaining time and reset the timer as each one goes in.

Workouts and interval training

Time planks, rest periods between sets or full Tabata rounds. Reset between rounds to keep a fast-paced session moving without checking your watch. Set your round length once, then hit reset between sets to keep rest periods honest.

Exams and timed practice

Students rehearse essays and problem sets against the clock. A visible countdown builds real exam-day pressure and teaches pacing. Practicing under a visible countdown trains you to allocate minutes per question before the real day.

Meetings and presentations

Keep talks on schedule by starting a countdown for each speaker or agenda item. The alarm is a neutral, polite way to wrap up. Share your screen with the timer visible and speakers will self-regulate without awkward interruptions.

Games, kids and classrooms

Teachers use countdowns for quizzes and cleanup time; parents use them for turn-taking and screen-time limits that kids can see and trust. Children accept ‘when the timer rings’ far more readily than arbitrary adult deadlines.

Tips

  • Keep your device volume up and the tab unmuted — the alarm is the whole point, and a silent tab will not warn you.
  • For repeated intervals (like steeping multiple cups of tea), leave the duration set and just hit Reset then Start.
  • Need to time how long something took instead? Use the stopwatch on this site — the countdown is for time remaining.
  • On phones, add the page to your home screen so the timer is one tap away in the kitchen or gym.

Frequently asked questions

How do I set a countdown?
Type the hours, minutes and seconds you want into the three boxes and press Start. You can set anything from a few seconds to many hours, and the timer immediately begins counting down with a live progress bar. The timer starts immediately and the progress bar gives you an at-a-glance sense of remaining time.
What happens when the timer reaches zero?
The display shows that time is up and an alarm sound plays using your device's audio. Make sure your volume is on and the browser tab is not muted, otherwise you will miss the alert. If you miss the sound, the finished state stays on screen until you reset, so the alert is hard to overlook.
Can I pause and resume the countdown?
Yes. Pressing Pause freezes the remaining time, and pressing Start resumes from exactly where you paused. This is useful when you get interrupted mid-task and do not want to lose your place. This makes it practical for tasks with interruptions, like simmering a sauce while answering the door.
Does it work if I switch to another tab?
Yes. The countdown is calculated from your device clock, so it keeps accurate time in the background. Return to the tab any time to see the updated remaining time and progress bar. Keep working in other tabs with confidence — the alarm will still sound when time expires.
Is there a limit to how long I can set?
You can set hours, minutes and seconds freely, so multi-hour countdowns for slow cooking, long downloads or work blocks are all fine. Very long durations may be affected if your device sleeps — keep it awake for critical timing. For critical timing over many hours, keep the device awake so the alarm can sound.
Is this countdown timer free?
Yes, completely free with no signup and no usage limits. It runs entirely in your browser, so there is nothing to install and no account to create. There are no accounts, watermarks or usage caps — set as many countdowns as your day needs.
Can I use it as a classroom timer?
Absolutely. The large display and progress bar are easy to read from the back of a room when projected or shared on a screen, making it great for quizzes, activities and transitions. Students respond well to a visible, impartial countdown, and transitions between activities get noticeably smoother.