1 Hour Timer

This timer counts down sixty minutes, shown as hours, minutes and seconds, and begins the moment the page opens. At zero it plays a repeating alarm and flashes the screen until you stop it.

An hour is long enough that you will want to leave the page alone. The time comes from the system clock, so the countdown stays correct even if the tab is hidden, and the tab title shows what is left.

How to use this tool

1. Open the page. The clock starts at 1:00:00.
2. Press Pause or Space if you need to hold it, and press again to resume.
3. Press Restart (R) to go back to a full hour.
4. Press Stop or any key when it rings. +1 minute adds a minute at a time.

Errands and reminders

Use it to remember a parking meter, to collect laundry from a shared machine, to take something out of the oven that cooks slowly, or to follow up on a message you have sent. Because the countdown continues in the background, you can work in other tabs.

Long sessions

A one-hour block suits a deep-work stint, a long lesson, a studio drawing session or a practice test. If you need a break, pause the clock rather than restarting it, or plan the hour in parts and glance at the tab title to see where you are.

For a work pattern that alternates focus and rest, the Pomodoro timer may fit better than a single long hour.

Making it last

A web page cannot keep running if you close the tab or shut the device down, so keep the browser open and the device charged. Where supported, the page asks to keep the display awake, which uses extra battery on a phone.