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Aurora Borealis Screensaver

Northern lights, in flowing green and violet curtains.

Press F for fullscreen

About Aurora Borealis Screensaver

Northern lights flowing across a twilight sky over a dark mountain silhouette. Three overlapping curtains in green, mint, and violet wave at independent frequencies, blended additively so where they overlap, the color gets brighter and warmer. The motion is slow on purpose — real aurora drift, not strobing chase lights. The lower third of the canvas is a jagged mountain silhouette with a hairline of moonlight on the ridges, giving the aurora a foreground anchor that makes the lights feel sky-sized rather than abstract.

What the Aurora Screensaver Does

Three independent aurora bands in green, mint, and violet flow across a twilight sky above a dark mountain silhouette. The bands use additive blending — where they overlap, the light intensifies and shifts to brighter teal, mirroring how real aurora emission layers interact in the upper atmosphere. Each band flows along its own path with independent speed and curvature, creating the characteristic curtain-like motion of the northern lights. Below, 110 stars fill the Arctic night sky. Everything renders client-side on HTML5 Canvas at 60fps with no external assets.

Relaxation, Meditation, and Sleep Aid

The aurora's slow, non-repetitive motion has a deeply calming quality that is unlike any other natural phenomenon. Use it as a relaxation background on a secondary monitor during work or study — the flowing curtains provide visual interest without the stimulation of rapid movement. For sleep aid, reduce brightness and run it on a bedside monitor. The cool color palette (green, violet, dark blue) and the slow drift are conducive to sleep onset. The fullscreen presentation uses the dark, star-filled background as the dominant visual, minimizing blue-light concerns.

Nordic-Themed Spaces and Event Design

Nordic and Scandinavian-themed restaurants, saunas, and design studios use the aurora on wall-mounted displays to evoke Arctic atmosphere. Spa and float-center facilities use it as a pre- or post-session visual environment. Event designers project it onto walls, ceilings, or drapery for Nordic, winter, or cosmic-themed events — the flowing light bands respond beautifully to projection on textured surfaces. The aurora borealis is the ultimate symbol of Nordic natural wonder, and a fullscreen aurora display sets an unmistakable mood.

Pro Tip: Additive Blending Is the Key

The additive blending is what makes this aurora look like light rather than paint. In subtractive color mixing (paint), overlapping colors get darker. In additive blending (light), overlapping colors get brighter — exactly how real aurora emission layers interact when multiple wavelengths coincide in the upper atmosphere. Green light comes from oxygen atoms at lower altitudes, violet from ionized nitrogen. The screensaver's palette faithfully reproduces these wavelengths.

How to use it

  1. 01

    Go fullscreen

    Press F. The mountain horizon and aurora fill the panel.

  2. 02

    Dim the room

    Aurora colors read best in a dark room. Lower the surrounding light.

  3. 03

    Watch the bands interact

    Where green and violet overlap, additive blending produces a brighter teal. The interactions never repeat.

Frequently asked

The shortest path between you and the answer.

Is this what real aurora looks like?

A stylized impression. The slow drift and green/violet palette are accurate, but real aurora often has sharper top edges and brighter curtains.

Why green and violet?

Green is emitted by oxygen atoms at lower altitudes, violet by ionized nitrogen. These are the two most common colors in real aurora displays.

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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