ScreenToolsScreen.tools

Digital Clock

Seven-segment LED clock. Black background, bright white digits.

Press F for fullscreen

About Digital Clock

A seven-segment LED clock on a pure black background. The digits are rendered as SVG paths that match the geometry of a real LCD alarm clock — each segment has the same trapezoidal shape and the same 7-bar layout that defined digital clocks from the 1970s onward. The colon blinks once per second to mark the passage of time.

Seven-Segment Heritage

The seven-segment display was patented in 1908 but did not become common until LED and LCD technology made it cheap in the 1970s. Every digital alarm clock, calculator, and gas-pump display from that era used the same seven-bar geometry. Our SVG reproduction preserves the trapezoidal segment shape, the diagonal cuts at the corners, and the specific gaps between segments that make the style instantly recognizable.

OLED-Friendly

The background is pure black (#000000), which means on an OLED display the pixels between the digits are physically off. This makes the clock suitable as an always-on desk clock without burn-in risk — only the lit segments are drawing power, and they change every second so no single subpixel stays on long enough to retain an image.

How to use it

  1. 01

    Open the page

    The clock immediately shows your current local time in HH:MM:SS format with a blinking colon.

  2. 02

    Fullscreen for desk-clock use

    Press F. The digits scale to fill the panel. On OLED the background goes physically dark.

  3. 03

    Use as a reference clock

    Leave it running on a secondary monitor. The colon blink gives you a precise seconds reference.

Frequently asked

The shortest path between you and the answer.

Can I change the digit color?

Not on this page. The white-on-black styling is the default for seven-segment displays and the most legible. The custom-color tool in the Colors hub lets you fill the screen with any color if you need a different backdrop.

Is this tool free?

Yes. Every ScreenTools.co tool is free, with no account, no paywall, and no install.

Does it work on mobile?

Yes. Layouts adapt to phone and tablet screens. Mobile Safari restricts true fullscreen, but the page fills the viewport and you can add the page to your Home Screen for an app-like experience.

Does it work offline?

Once a tool's page has loaded once, the runtime is local. A few tools that fetch fonts or icons need the first hit online; after that, refresh works offline.

Does this collect my data?

No personal data leaves your browser. The site has lightweight, privacy-respecting analytics for aggregate counts (which tool was opened) and nothing else.

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