Set a 1 hour timer
The timer is set to 1 hour. Tick Keep the screen on if you need it, then press Start, or Space.
- Runs on your device
- No sign-up
- Works offline after a visit
| Lap | Lap time | Total |
|---|
Keys: Space starts or pauses, R resets, and L records a lap on the stopwatch.
This page sets the hours field to 1, which is 3,600 seconds. Press Start or Space to begin. A timer this long is where the screen option matters. Tick Keep the screen on while it runs, and the browser keeps the screen awake where it supports that. Otherwise the countdown still runs, and the title shows the time left.
The browser releases the screen lock when the tab is hidden, and the page asks again when you come back. So for the whole hour, keep this tab in front. If you need a break partway, press Space to pause. The Pomodoro timer works in shorter blocks if you prefer those.
How to set a countdown timer
- Pick a preset, or type hours, minutes and seconds, then press Start.
- Switch to Stopwatch for laps, and press Lap or L to record each one.
- Switch tabs if you like. The time stays right, and a tone sounds when a timer reaches zero.
Questions
Why does a long timer need the screen option?
Keeping the screen on stops the display from dimming or locking during the countdown, where the browser supports it. Leave the box empty if you only need the tone at the end.
Can I use one timer for an hour of study with breaks?
The timer runs one countdown, so it does not split the hour for you. Pause with Space for a break and press Space to carry on, or set a shorter length for each block.
Why does the timer stay accurate when I switch tabs?
It reads the clock rather than counting ticks. When it starts, it saves the end time, and each update subtracts the current time from that. Browsers slow down timers in background tabs, so a counter that adds one per tick can drift. This one does not.
Will the sound play if the tab is in the background?
The tone is made in the browser and scheduled on the audio clock when the timer starts, so it sounds at the end time even if the tab is in the background. The page title shows the time left while it runs. Your device volume and mute settings still apply, and on phones the browser may stop sound when the screen locks, so keep the page open and the volume up.
Does the screen stay on while the timer runs?
Only if you tick the box, and only where the browser supports the Screen Wake Lock. The browser releases the lock when the tab is hidden, so the page asks again when you come back.
What do the lap times mean?
Each lap time is the time since the previous lap, and the total is the time since the stopwatch started. Reset clears the laps. Nothing is saved after you close the page.
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