Countdown Timer
Set hours, minutes, and seconds — or pick a quick preset — and press Start. The timer beeps and flashes when it reaches zero, stays accurate in background tabs, and shows the remaining time in your tab title.
05:00
Set duration
Frequently Asked Questions
- How do I set the countdown timer?
- Type the hours, minutes, and seconds you want, or click one of the quick presets (1, 5, 10, 15, 30, or 60 minutes), then press Start. You can pause and resume at any time.
- Will I hear an alarm when the timer reaches zero?
- Yes. A sequence of beeps plays and the display flashes when the countdown hits zero. Keep the tab open (it can be in the background) for the sound to play.
- Does the timer stay accurate in a background tab?
- Yes. The timer calculates the remaining time from your device's clock rather than counting ticks, so it stays accurate even when the tab is in the background. The remaining time also shows in the tab title.
- What is the longest countdown I can set?
- You can set up to 23 hours, 59 minutes, and 59 seconds — enough for any exam, presentation, or study session.
- Is this countdown timer free?
- Yes. It is completely free, needs no account or install, and runs entirely in your browser — nothing is sent to a server.