Timers

These timers measure elapsed time with a monotonic clock and recompute the remaining time on every update, so a throttled background tab cannot make them drift. They are honest about their limits, too: a browser timer only fires while the page is open, and it cannot wake a sleeping device.

Countdown Timer

Set a countdown with presets, big display, and an optional chime.

Open Tool

Stopwatch

Precise stopwatch with laps, splits, and keyboard control.

Open Tool

Pomodoro Timer

Configurable work and break cycles with session tracking.

Open Tool

When to use these tools

Timing meetings, breaks, cooking, and study sessions
Pomodoro work/break cycles with configurable durations
Measuring elapsed time precisely with lap splits
Keeping a countdown visible while you work in another window

Frequently asked questions

Does the timer keep running if I close the tab?

No. A browser timer lives in the page. If you close it, the timer is gone. Switching tabs is different: the timer keeps measuring real elapsed time and shows the correct value when you return.

Why don’t the timers count down once per second?

Counting down per tick accumulates error because browsers slow timers in background tabs. Instead, every render recomputes remaining time from a monotonic clock, keeping the display accurate.

Will the alarm sound if my device is asleep?

No. Browser audio and timers cannot wake a locked or sleeping device. For alarms that must fire while you are away from the browser, use a system-level alarm or phone timer.