What this tool does
Use one screen as either a countdown timer or a stopwatch, with pause and reset controls for short sessions.
How to use it
- Choose Timer for a countdown or Stopwatch for elapsed time.
- For a countdown, enter minutes and seconds before pressing Start.
- Pause to hold the current value, or Reset to return to the entered duration or zero.
Method
The display is formatted as hours, minutes, and seconds. While running, elapsed time is calculated from the browser clock rather than by simply subtracting one on every visual update, which reduces drift when rendering is delayed.
Worked example
Set 25 minutes for a focused work block, start it, and pause during an interruption. In stopwatch mode, start at 00:00:00 and record the displayed time when a task ends.
Common uses
- Focus, study, cooking, and exercise intervals
- Timing a presentation rehearsal or manual task
- Running a simple stopwatch without installing an app
Limitations
The timer exists only in the current tab. Closing or reloading the page clears it, and a sleeping device may delay the visible completion notice. It does not schedule operating-system alarms or synchronize across devices.
FAQ
Will it continue in a background tab?
Elapsed time is based on the browser clock, so the value catches up when the tab runs again, but browsers may delay updates and notifications in the background.
Can I run several timers at once?
This page maintains one active timer or stopwatch. Open separate tabs only if you can clearly identify each one.