Time shown as actual binary — each decimal digit of the hour, minute, and second drawn as its own column of lit and unlit dots, the same BCD (binary-coded decimal) convention hardware binary clocks use, running as a page instead of a soldered kit.
A column of dots reads as background decoration to anyone glancing over, but tells the exact time to anyone willing to do the arithmetic — a quiet flex for a dev desk or homelab shelf.
Pull it up on a shared screen and challenge someone to read the time off it cold — most people need a minute the first try, then can't stop doing it in their head afterward.
Glancing at real time values a few times a day builds the 8-4-2-1 habit faster than isolated drills, since there's an answer you already know to check yourself against.
Sits well next to blinking network gear and rack lights — it already looks like it belongs among status LEDs, unlike a conventional clock face.
Four steps between you and a working set of blinking lights.
The dots are already lit the moment the page loads — no app, no extension, and the layout holds up identically on a monitor, a tablet, or a phone propped on a desk.
Settings has all eight dot colors behind a single tap, saved locally so your pick is still there whenever you come back.
The 12/24-hour toggle, seconds, and the date live as three independent switches — flipping one leaves the dot columns you're not looking at untouched.
Fullscreen strips the browser away entirely, leaving just the dot columns on screen; pair it with Keep Screen On if it's sitting on a shelf unattended.
Everything the binary clock actually does.
Switching formats only changes how the digits are grouped — the underlying bit columns work exactly the same either way.
Eight lit-dot colors to pick from in Settings, from a cool cyan to a warm amber, each rendered on the same dark background.
One tap hides every browser control, leaving nothing on screen but the dot grid itself.
The same Wake Lock mechanism used elsewhere on this site holds the tab awake here too — worth flipping on if the display is going to sit somewhere unattended.
Resize the browser window or pull it up on a phone — there's no fine detail in a dot grid to lose, so it stays legible shrunk down or blown up.
Nothing here needs a login or a network call once the page has loaded — every dot is drawn locally, and your preferences stay put on this device.
Starting with the question everyone actually has.
Each column is one decimal digit, read top to bottom as 8-4-2-1 — add up the values next to the lit dots and you get that digit. Six columns in a row spell out hours, minutes, and seconds.
A single binary number for the whole time would need a different number of digits depending on the hour, which shifts the whole layout throughout the day. BCD keeps each decimal digit in its own fixed column instead.
Same underlying idea — BCD, lit versus unlit — but this one is a webpage instead of a soldered circuit board. No wiring, no case to build, just open the tab.
Yes — toggle it on in Settings alongside seconds, independent of everything else on the display.
It's off by default — switch it on in Settings if this is going to sit unattended on a shelf or rack, otherwise your device's own sleep timer stays in charge.
The glow colors pair naturally with RGB keyboards, case lighting, or a homelab rack — Green and Amber lean toward a classic terminal look, the rest lean brighter and more decorative.
Prefer a mechanical flip-card, retro pixel-grid, or neon gradient look instead? See the Flip Clock Online, Pixel Clock Online, or Neon Clock Online, or open the full Digital Clock to flip between every theme and setting.