Countdown Timer
Set a duration and count down — an alert fires when time is up. Nothing is uploaded.
Free online countdown timer
Set any combination of hours, minutes, and seconds, then press Start. The display counts down in real time; Pause freezes it and Resume continues from where you left off. When the counter reaches zero a browser alert fires so you notice even if the tab is in the background. Everything runs locally — no account, no install, no data leaves your machine.
The timer is useful for cooking, presentations, meetings, exam practice, or any task that benefits from a visible deadline. Reset returns you to the values in the inputs so you can run the same interval again without retyping.
FAQ
Does it work when the tab is hidden? The JavaScript interval continues running in a background tab on most browsers. The final alert fires when time is up, though the display may update slightly less often while hidden.
Can I set more than 99 hours? The hour input caps at 99 — enough for any practical kitchen or work timer. For longer intervals a calendar reminder is a better fit.