▮ Device Bench

Device test · Display

White Screen

Fill your screen edge to edge with pure white — a soft light for video calls, a bright backdrop for tracing or checking negatives, or a plain field that makes dust and dead pixels obvious. Six more colors are one tap away, every one of them static: nothing here flashes or cycles.

ColorWhite Hex#ffffff Screen— Viewport— Fullscreenoff

Or pick a backdrop color — each works full-screen too:

Brightness note: a web page cannot change your hardware brightness. For the strongest light, turn your screen brightness up with your device's own controls first — this page then drives every pixel to its maximum.

How this tool works

One click paints a single, static color across everything the browser can reach. The page asks for fullscreen so the browser's own chrome disappears, then sets the backdrop to pure white — #ffffff, every subpixel of every pixel driven to maximum. That uniform field is what makes the tool useful several ways at once: as a soft light source for video calls, as an even backlight for tracing paper or film negatives held against the glass, and as the background on which dust, scratches, and dead pixels are most obvious. The swatches swap in green, blue, yellow, orange, purple, or pink for chroma-key checks and mood lighting, and each is just as static as the white.

Full screen comes from the browser's Fullscreen API: the page requests it, the browser animates into it, and pressing Esc or the ✕ button hands control back. On devices that don't offer element fullscreen — iPhones, mainly — the same colored layer simply covers the whole viewport instead. The readout strip is live the entire time: it reports the current color's hex value, your display resolution as the operating system reports it (window.screen), the viewport size, and whether true fullscreen is active. All of it is read locally in your browser; nothing is measured, stored, or sent anywhere.

The honest limit is brightness. A browser cannot touch hardware brightness — the white screen asks every pixel for its maximum, but how many nits that produces is set by your backlight or OLED drive level, which only you or your operating system can change. Color accuracy is nominal too: without hardware calibration, #ffffff is whatever your panel's white point happens to be, and features like Night Light will tint it warm. And the colors are deliberately static — nothing flashes or cycles on its own, so the light stays steady on camera and a color only ever changes when you change it.

Frequently asked questions

Can this page make my screen brighter?
No — no web page can change hardware brightness, and this one doesn't try. What it does is ask every pixel for its maximum output by painting pure white. For the strongest light, turn your screen brightness to maximum with your device's own controls, then start the full-screen white.
How do I use the white screen as a light for video calls?
Open it on a second monitor, or in a window beside your call, and go full screen. A big white area just behind or beside the camera works as a soft key light that fills in shadows without the harshness of a lamp. If the light looks too cold or too warm, your display's color temperature setting is doing that — not the page — and a warmer setting is usually more flattering.
Will a solid white screen damage my display or cause burn-in?
A solid color is a normal thing for a panel to show, and short sessions are harmless on any screen technology. The one caution is OLED, where any static image held for many hours contributes to burn-in — so treat the white screen as a work light, not a screensaver, and don't leave it parked on an OLED overnight.
Why does the white look slightly blue, yellow, or pink?
Because white is whatever your display's white point is. Night-mode features like Night Shift or Night Light warm the screen toward yellow, and panels themselves vary — two monitors side by side rarely show the same white. The page always sends the same value, #ffffff, so any tint you see is coming from the display, which makes this a quick way to compare two screens.
How do I get out of full screen?
Three ways, and they work by touch or keyboard: tap or click the ✕ button in the corner (tap anywhere to bring it back if it has faded out), press Esc, or use your browser's own exit gesture. Arrow keys step through the backdrop colors while you're full screen; the readout always shows the current color's hex value.

Related tools

tap for next color · ✕ or Esc to exit