Pixel Clock Online — A Free Fullscreen Dot-Matrix LED Clock

A Real Dot-Matrix Clock, Not a Retro Font

Every digit is drawn dot by dot on an actual 5x7 grid — the same way a real LED scoreboard or calculator display works, not a font dressed up to look retro. Runs as a page you can leave open instead of software you install.

How the Dot-Matrix Grid Works

This isn't a blocky font — here's what a real bitmap grid actually does differently.

A real 5x7 bitmap, not a font

Each digit is a literal grid of up to 35 dots, individually marked on or off — the same method a physical LED scoreboard or calculator display uses to draw a shape, not a font file styled to look blocky.

Unlit dots stay faintly visible

Every position in the grid renders a dot — the ones outside the current digit sit dimmed at low opacity instead of vanishing, so you can see the whole matrix a digit is built from, the way a real panel shows dark cells next to lit ones.

One color drives the whole grid

Switch the glow color in Settings and both the lit and the dimmed unlit dots update together — there's no separate flat gray background, just the same color at two different strengths.

How to Use

No settings menu to dig through — four steps and it's running.

Open in any browser

There's no loading screen to wait through — every dot is lit as soon as the page opens, and it holds up whether you're using a phone, a laptop, or a second screen.

Pick your glow color

Settings holds all eight glow colors behind one tap, and your pick carries over the next time you're back.

Tweak the display

Format, seconds, and the date each get their own switch in Settings — flip any one of them without touching the glow or the others.

Go fullscreen

The fullscreen button strips the browser away, leaving a standalone LED marquee; pair it with Keep Screen On if you don't want it dimming while you're away.

Features

The short list of what's under the hood.

Genuine 5x7 dot-matrix rendering

The only style on this site that draws digits as individual on/off dots instead of a solid glyph — see exactly how the grid works in the section above.

12 / 24-hour format

AM/PM or 24-hour, rendered dot-by-dot in the same 5x7 grid as the rest of the display — no separate font swap needed.

8 dot-matrix colors

Green, Amber, Red, Blue, Purple, White, Cyan, and Pink — eight glow colors, all drawn on the same real dot-matrix grid.

Fullscreen mode

Strip the browser tab away entirely and it reads like a real scoreboard or arcade marquee, not a webpage.

Keep screen on

Backed by the Wake Lock API, so the display keeps glowing instead of your laptop deciding to sleep on you.

Works everywhere

Open it on a phone, a tablet, or a spare monitor — the dot grid scales cleanly at any size.

Runs in your browser

Nothing calls home to a server — everything renders client-side, and your settings live in this browser, not an account.

FAQ

What people usually want to know before switching to this one.

Is this actually a pixel/dot-matrix display, or just a retro font?

It's a real dot-matrix rendering — each digit is drawn dot by dot on a 5x7 grid, the same way a physical LED scoreboard or calculator display works. It's not a font styled to look blocky; the grid is genuinely built that way.

Can I change the glow color?

Yes — eight colors are available in Settings: Green, Amber, Red, Blue, Purple, White, Cyan, and Pink, all sharing the same glow strength so only the hue changes.

Is this good as a streaming overlay?

Yes. The background is a solid near-black, so it reads as a small glowing element without competing for attention — pair it with OBS's Chroma Key filter on that background color if you want it to blend directly into your scene instead of sitting in its own box.

Does the glow strain your eyes at night?

The amber and red variants skip green's blue-leaning tint for a warmer glow — Red is also noticeably dimmer if brightness itself is the concern, while Amber stays close to Green in intensity but reads warmer.

Will it keep my screen from sleeping while it's on?

Only if you turn on Keep Screen On in Settings — it's off by default so the pixel clock doesn't override your device's normal sleep behavior unless you ask it to.

Does it work well next to other RGB or retro gaming gear?

Yes — Purple, Cyan, and Pink pair naturally with RGB keyboards and case lighting, while Green and Amber lean toward a classic monochrome-terminal or arcade-cabinet look.

From the Blog

Prefer a mechanical flip-card, true binary display, or neon gradient look instead? See the Flip Clock Online, Binary Clock Online, or Neon Clock Online, or browse the full Digital Clock, where every theme and setting lives together.