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Countdown Timer

Set a clear countdown, keep the screen awake when your browser allows it, and get back to the thing.

Right on time

Set it, start it, get back to the thing.

The countdown follows the real clock, so a background tab does not quietly give you extra time.

Ready when you are05:00
Minutes05:00

Keep it useful

A few sensible extras.

A couple of useful details

See the time left.

Set a duration, start the countdown, and keep the remaining time large and easy to read. The timer follows the real clock, including when a background tab wakes up late.

Example

Put a five-minute discussion timer on a shared screen.

Worth knowing

Sound, fullscreen, and screen wake-lock behavior depend on browser and device permission. The adjustable duration is 1 minute to 24 hours.

Will it stay accurate in a background tab?

The countdown calculates remaining time from the real clock rather than assuming every browser update arrived on time.