Countdown: h m s Size:

Countdown timer help :

Move the mouse over the thin line at the top of the screen to see the controls.

In the section labeled Countdown above, enter the hours (h), minutes (m) and/or seconds (s) the timer shall count down.

Reset stops and resets the timer to the given start value.
Start resets and starts the timer from the given start value.
Stop stops the timer without resetting it (freeze).
Continue continues counting from the currently displayed value.

With smaller and larger you can adjust the font size of the display.
With Invert you can swap the colours of the display.

After completing the countdown, "00:00:00" will be displayed in red (and, depending on the browser, also blinking) until the timer is reset.