Don's Tools · Time & Productivity · Countdown Timer

Countdown timer

Set a timer with presets and an alarm, right in your browser. Nothing is uploaded.

Quick set
HoursMinutesSecondsLabel
05:00
Works offline: the timer runs entirely in your browser, nothing uploaded. It keeps accurate time even if the tab is in the background, and beeps when it finishes (turn your sound on).
Countdown Timer is a free productivity tool that runs entirely in your browser with nothing uploaded. Set hours, minutes and seconds or pick a preset, add a label that shows in the browser tab, and it beeps and flashes when time is up, staying accurate even when the tab is in the background.

Frequently asked questions

Does the timer keep accurate time in the background?

Yes. It tracks the real end time rather than counting ticks, so it stays accurate even if the tab is in the background or your device sleeps briefly. It needs the page to stay open to alert you.

Will it make a sound when it finishes?

Yes, it beeps repeatedly and the screen flashes. Make sure your device sound is on; on mobile you may need to interact with the page first so the browser allows audio.

Is anything uploaded?

No. The timer runs entirely in your browser with nothing uploaded, and it works offline.

Can I set a label?

Yes. Add a label such as a task name and it appears in the browser tab, so you know which timer is running.

Can I set hours, not just minutes?

Yes. Enter any combination of hours, minutes and seconds, or use a quick preset.