Fullscreen Timers & Clocks
Timers and clocks sized to be read from the back of a room. Every one goes fullscreen and keeps its settings in the URL, so a configured timer can be bookmarked or shared as a link.
Timers built to be read across a room
These are sized for a projector or a second monitor rather than a phone in your hand. Digits scale with the window, so a countdown on a classroom screen stays legible from the back row and the same page still works in a small browser window on a desk.
Every setting is written into the address bar as you change it. A fifteen minute countdown is just a URL, which means you can bookmark the exact timer you use every day, or paste it into a meeting invitation and have everyone open the same clock.
Nothing here needs an account, and nothing is stored on a server — the timer runs entirely in your browser, so it keeps working if the connection drops.
Questions
How do I get a fullscreen timer?
Set the time, then press F or the fullscreen button. The digits fill the display and scale with it, so the same page works on a phone on a desk and on a projector at the front of a lecture hall. Escape leaves fullscreen and the timer keeps running.
Can I bookmark a timer that is already set?
Yes, and that is the main reason to use these rather than a phone. Every setting is written into the address bar as you change it, so a fifteen minute countdown is simply a URL. Bookmark the one you use every day, or paste it into a meeting invitation so everyone opens the same clock.
Does the timer keep running if I switch tabs?
Yes. The countdown is calculated from clock time rather than counted frame by frame, so it stays accurate in a background tab, on a throttled browser, and after the machine has been asleep. What can be delayed is the alarm sound, which some browsers hold back until the tab is looked at again.
Does it work without an internet connection?
Once the page has loaded, yes — everything runs in the browser and nothing is sent to a server. If the connection drops mid-session the timer carries on. You do need to be online for the initial load.
Which timers are here?
A countdown, a Pomodoro timer, an interval and HIIT timer, a stopwatch with laps, a classroom timer, a visual timer that empties a disc as the time runs down, a meditation timer, a breathing pacer and a world clock.
Is there an alarm when the time is up?
Yes — a sound and a full-screen colour change, so it works in a noisy room and in a silent one. Browsers block audio until you have interacted with the page, which pressing Start counts as, so start the timer by clicking rather than by reloading a URL with the alarm expected.
Can I use it on a classroom projector?
That is what the sizing is for. The digits scale to the window, the contrast is high enough for a washed-out projector in a lit room, and the classroom timer adds larger controls and a colour that shifts as the remaining time shrinks so students can read the state from across the room.