Fullscreen clock for the whole room
The time, readable from the back row.
Open the page, press F, and a dial — or a wall of up to twelve — takes over the screen. Twelve faces, from a brass dial to an LED readout, 12 or 24 hour, seconds if you want them, any time zone. No sign-up and nothing to click away.
- Fullscreen
- 12 or 24 hour
- Any time zone
- 12 faces
- Up to 12 cities
Three steps to a clock nobody squints at
-
01
Set the format
Pick a dial style, 12 or 24 hour, keep the seconds or drop them. One city for the room, or up to twelve for a wall of clocks. Every choice is remembered on this device, and the share link can carry it to another screen.
-
02
Press F
The browser chrome and the controls go away, leaving the dial and the readout on the projector, the hallway display or the TV in the kitchen.
-
03
Leave it running
Each frame reads the device clock, so the hands jump straight to the right time after a sleeping laptop wakes up. There is nothing to restart and nothing to reset.
Where a big clock beats a phone screen
Any screen that other people look at is one somebody has to keep on the right page.
Classrooms and lecture halls
Students check the time without reaching for a phone, and a lesson starts on a shared minute instead of five different ones.
Meetings and stand-ups
A visible clock in the corner of the room makes a fifteen-minute slot mean fifteen minutes.
Lobbies, studios and shop windows
An old tablet behind the counter becomes a clock, with the date and zone underneath and no app to install.
Screens in another zone
A team spread across continents can put the cities that matter to the meeting on one wall and read them at a glance.
A clock built to be looked at, not clicked
The controls are few on purpose. Everything that matters is legible from a distance.
Dial and digits together
A brass clock face for the sense of time, with a digital readout and the full date underneath for the exact one.
Time zones that keep up
Every dial can sit in its own zone. Zone changes and daylight saving come from the browser's zone data, not a hard-coded offset, so summer and winter are both right.
Seconds, or not
The second hand is a pleasant motion on a wall and a distraction on a lectern. Turn it off with one key.
Fullscreen that fades back
The controls disappear after a couple of seconds and return when the pointer moves, so the screen stays clean between adjustments.
The display stays awake
While the page is visible it asks for a wake lock, so a clock on a hallway screen does not dim itself out of a job.
Links that carry the setup
Share copies a URL with the cities, the dial, the layout, the format and the seconds inside, so the next screen opens already configured.
A wall of clocks
Two to twelve cities in one to four columns. Every dial keeps its own zone, labelled with the city, the time and the day it is already on.
Keys
Everything on this page has a key, and every key works while the clock is fullscreen.
| Key | Does |
|---|---|
| F | Fullscreen on and off |
| T | Switch between 12 and 24 hour |
| S | Show or hide the seconds |
| C | Copy a link with the current settings |
| D | Open the dial styles |
| Z | Add or remove cities |
| L | Change the columns of the wall |
| Esc | Close a panel, or leave fullscreen |
Questions
Is this clock accurate?
It reads the clock of the device you open it on, the same time the operating system keeps in sync over the network. There is no server round trip and no counting from an arbitrary starting point, so the display does not drift while it is open. If the device itself is wrong, the clock is wrong by the same amount.
Can I show a different time zone?
Yes. Pick a zone from the list and the dial, the digital readout and the date all move to it. Daylight saving is handled by the browser's own zone data, so a Berlin clock is right in summer and in winter. The share link can carry the zone with ?tz=Europe/Berlin.
Can I hide the seconds?
Yes. Press S or use the Seconds button. The second hand and the seconds digits both disappear, which is calmer on a screen someone has to look at for an hour.
Will the screen stay on all night?
While the page is visible it asks the browser for a wake lock, so the display normally stays awake. Screen savers, battery-saver modes and OS power settings can still override the request. For a clock that runs for days, plug the device in and turn its sleep timer off in the system settings.
Can I use it on a projector or a TV?
That is what it is for. Connect the screen, move the browser window to it, then press F. On iPhone, where browsers cannot fullscreen an element, the clock expands to fill the screen instead — tap the close button or press F again to leave.
Can I send someone a clock with my settings?
Yes. Share copies a link that carries the format, the seconds setting and the time zone, so a 24-hour Berlin clock opens exactly as you set it up.
Does the clock keep the right time if I change the system time?
Yes. Every frame reads the current device time, so a manual change or an automatic network correction shows up on the next tick. Nothing is cached from when the page loaded.
Can I show several time zones at once?
Yes. Add up to twelve cities and the stage becomes a wall of dials, in one to four columns or a layout the page picks for the screen. One dial style applies to the whole wall, each label shows the city, its time and the day difference, and the share link carries the cities, the style and the layout.