Toolbox
Countdown Timers
Quick add
Set a duration first (H / M / S, or pick a quick-add).
No countdowns yet — add one above, or use a quick-add.
Run as many countdowns as you like, each independent. Before a timer starts, click the time inside its ring to edit the duration (Enter saves, Esc cancels). When one reaches zero its ring turns red and a triple beep plays (simultaneous finishes share one alarm instead of stacking noise). The tab title shows the soonest remaining time, and closing the tab asks for confirmation while anything is running.
Add as many countdowns as you need — each with its own name, duration and progress ring. Presets like 5 or 25 minutes add in one click, timers run independently, and a triple beep plays when one reaches zero.