A gray screen fills your display with an even, neutral mid-gray in one click. This free online gray screen is the tool of choice for checking screen uniformity and the dirty screen effect, spotting backlight bleed and banding, and providing a low-glare neutral background that is easy on the eyes. Go fullscreen for a smooth gray field, and adjust the shade to reveal different panel issues.
What is a gray screen?
A gray screen is a full-screen neutral gray that lights every subpixel at a partial, equal level. That even mid-tone is the best way to expose subtle panel problems: uneven brightness, tint shifts, banding, and the dirty screen effect (DSE) that shows as faint smudges during motion. A gray screen is also a comfortable, low-glare neutral background and a useful mid-tone reference when calibrating a display.
What people use a gray screen for
Test screen uniformity & DSE
An even gray field is the standard way to reveal the dirty screen effect and uneven brightness, especially visible on TVs during panning shots.
Check backlight bleed & banding
A mid-gray makes gradients and backlight inconsistencies easier to judge, exposing banding and patchy lighting across the panel.
Neutral low-glare background
Gray is restful and non-distracting, making a comfortable neutral background for reading, working, or resting your eyes.
Mid-tone calibration reference
A known neutral gray gives a helpful mid-tone reference point when adjusting brightness, contrast, and color balance on a display.
How to use the Gray screen
Open the page
The Gray screen loads instantly in any browser — no app, sign-up, or download needed.
Go fullscreen
Click anywhere on the gray area or press the F key to fill your whole display with gray.
Adjust it
Fine-tune brightness and warmth, or switch to another color from the bar below the screen.
Exit or save
Press Esc to leave fullscreen at any time, or use Download to save the gray screen as an image.
Gray screen tool features
Adjustable brightness
Slide brightness from 10% to 100% to dim the gray screen for night use or push it to maximum for cleaning and testing.
Warm & cool tint
Shift the gray light from cool to warm to match your room, reduce evening eye strain, or flatter your face on camera.
OLED burn-in guard
An optional mode nudges brightness slightly every few seconds, protecting OLED and AMOLED panels during long sessions.
Keep-awake mode
Uses the browser Wake Lock so your display never dims or sleeps during calls, cleaning, or photography.
Download up to 8K
Export the exact color as a crisp PNG from 480p all the way to 8K (7680×4320) for wallpapers, editing, or offline use.
Pixel grid & custom HEX
Overlay a fine grid to pinpoint faulty pixels, or type any HEX code to display a precise custom color.
Gray screen FAQ
How do I test for the dirty screen effect?
Display a full-screen gray, then look for faint blotches or uneven brightness, particularly while moving the image or during panning video. These smudge-like patches are the dirty screen effect.
Why use gray instead of white for uniformity?
White pushes the panel to maximum and can hide subtle variation; a mid-gray sits in the range where uneven brightness, banding, and tint shifts are easiest to see.
Can I change how light or dark the gray is?
Yes. Adjust the brightness slider to move between darker and lighter grays, which helps reveal different uniformity and banding issues, or type an exact HEX gray.
Is the gray screen free to use?
Yes. It is completely free with no ads, no account, and no limits. Open the page and start using the gray screen right away.
Does it work on phones and tablets?
Yes. The gray screen runs in any modern mobile or desktop browser — iPhone, Android, iPad, laptops and desktops — with no app to install.
How do I enter and exit fullscreen?
Click the screen or press F to go fullscreen. Press Esc (or F again) to exit. On mobile, tap once to expand and swipe or tap to return.
Will a gray screen hurt my eyes?
It is a steady light source, no harsher than any bright web page. Lower the brightness for comfort and follow the 20-20-20 rule on long sessions.
Is it safe for OLED displays?
Yes, especially with OLED protection turned on. For long use, keep brightness moderate (60–80%) so static color does not risk burn-in.
Can I download the gray screen as an image?
Yes. Open Download, pick a resolution up to 8K, and save a lossless PNG of the gray color for wallpapers, video editing, or graphic design.
When to use a gray screen
Choose a gray screen for panel-quality checks — uniformity, dirty screen effect, backlight bleed, and banding — or for a calm, neutral background. Use white to find dust and dark dead pixels, black to check true black and bright stuck pixels, and pure colors to test individual subpixels.
Why people trust this tool
This gray screen is a lightweight, browser-based utility built for one job: giving you a clean, full-coverage color surface the moment you need it. There are no trackers, no accounts, and nothing is uploaded — every setting stays on your device. We keep fullscreen behavior stable across browsers, test mobile fallbacks, and update the controls when displays and browsers change, so the tool stays reliable whether you are checking a new monitor or lighting a video call.