Online Timer with Alarm

Set a timer for any length, start it, and get a clear sound and on-screen alert the moment it reaches zero. Pause and resume whenever you need, or pick a one-tap preset for the common ones.

  • 100% free
  • No sign-up
  • No clutter or popups
  • Works offline
  • Accurate & distraction-free
Read the guide: How to Use an Online Timer
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How it works

  1. 1

    Set the time

    Type the hours, minutes and seconds you need, or tap a preset like 5 or 25 minutes.

  2. 2

    Start the countdown

    Press start. The big readout counts down, and the tab title updates so you can see it from another window.

  3. 3

    Hear the alarm

    When it hits zero, the screen flashes and an alarm sounds until you stop it. Pause and resume any time.

Great for

  • ✓ Cooking, baking and tea, without watching the clock
  • ✓ Timeboxing a task so it does not run long
  • ✓ Speeches, presentations and timed practice
  • ✓ Reminding yourself to take a break or stretch

No clutter, no popups, no waiting

This tool runs entirely in your browser, so it starts instantly and keeps working offline once the page has loaded. There is no sign-up, no popups fighting for your attention, and nothing is sent anywhere. Add it to your home screen and it opens like a real app.

Frequently asked questions

Will the alarm sound if I switch to another tab?
The timer keeps counting accurately in the background because it tracks elapsed time, not a tick that pauses. The sound plays when the time is up as long as the tab is still open; some browsers throttle audio in fully hidden tabs, so keeping the window visible is the most reliable.
Is the timing accurate over a long countdown?
Yes. The remaining time is worked out from a fixed end moment rather than by counting ticks, so it does not drift even over hours. The display refreshes smoothly while the underlying count stays exact.
Can I pause and come back to it?
Yes. Pause holds the remaining time, and resume picks up exactly where you left off. Reset clears it back to the time you set.
Does it work offline?
Yes. Once the page has loaded it keeps running with no connection, because the whole tool runs in your browser. You can install it to your home screen and open it like an app.
Do I need an account, and is anything tracked?
No account and no sign-up. The tool runs on your own device, so there is nothing to log in to and your settings stay on your machine. No popups, no clutter.