productivityDifficulty: 2/5
Online Countdown Timer
Set a countdown timer in your browser with presets for 1, 5, 10 and 25 minutes. Stays accurate in background tabs and alerts you when time is up.
05:00
Set a duration and press Start
Set a duration and press Start
How it works
- Set hours, minutes and seconds, or tap a preset.
- Press Start. The countdown is based on real timestamps, so it survives tab switching.
- Pause, resume or reset at any time. You are alerted in the page when time is up.
Frequently Asked Questions
Will the timer still finish if I switch tabs?
Yes. The countdown is derived from real timestamps, so returning to the tab shows the correct remaining time — or that it already finished.
Do I need to allow notifications?
No. Completion is shown in the page itself with a clear visual and audible cue, so no permission prompt is required.
Can I pause and resume?
Yes. Paused time is excluded from the countdown, so resuming continues exactly where you left off.