Free fullscreen display tool
Black Screen
Open a pure black screen at #000000 with one click. Use it to inspect pixels that stay bright, compare dark shades, reduce the light from an unused monitor, clean a display, or make a black PNG in the exact size you need.
How to use the black screen
- Leave Pure Black selected for the exact color #000000.
- Click the large black area, choose Fullscreen, or press F.
- Move a few steps back when checking a TV or large monitor. Look across the center, edges and corners.
- Press Escape to exit. Use the color links below the controls when you want to compare other solid fields.
What a black field can reveal
A black field removes most picture detail, which makes unwanted light easier to notice. On an LCD, it can reveal bright pixels, backlight bleed, clouding or an uneven dark field. On an OLED, black pixels can switch off, so a properly displayed black field should appear much darker.
This is a visual check, not a laboratory measurement. Brightness settings, local dimming, high dynamic range (HDR), viewing angle, reflections and the browser can all affect the result.
- Starting color
- #000000
- Works on
- Phones, tablets, computers and browser enabled TVs
- Installation
- None
- PNG sizes
- 480p to 8K, phone, tablet and screen size
- Shortcuts
- F for fullscreen, arrows for shade, Esc to exit
- Privacy
- Colors and images are handled in your browser
A more reliable visual check
How to run a black screen test on a monitor, phone or TV
A single black image cannot diagnose every display problem. Use the same simple routine each time so dust, reflections and settings do not mislead you.
Clean the surface
Turn the display off first and follow its maker's cleaning advice. Dust or a small mark can look like a bad pixel when the screen is on.
Use normal settings
Start with the brightness and picture mode you normally use. Disable automatic brightness if it keeps changing during the check.
Check in fullscreen
Open the black field across the whole display. Look straight at the panel, then change your angle slightly to see whether a glow moves with your position.
Compare solid colors
Follow black with white, red, green and blue. A mark that changes between fields may be a pixel issue. A mark that stays on the surface may be dust.
Understand the result
What you may see on a black screen
A tiny bright point
A subpixel, one of the red, green or blue parts inside a pixel, may be staying lit. Check the same point on the white screen, then on red, green and blue. A true dead pixel is usually easier to spot on a bright field, while a stuck subpixel may stand out on only some colors.
Light near an edge or corner
This may be backlight bleed on an LCD. A glow that changes when you move your head can also be related to panel viewing angle. Test at the brightness and distance you normally use before deciding whether it affects real content.
Pale patches across the panel
Uneven illumination is often called clouding or poor black uniformity. Local dimming and picture processing can change the pattern, so compare the result with those options on and off if your display provides them.
Black that looks slightly gray
An LCD uses a backlight behind the pixels, so some light can remain visible when the image is black. OLED pixels produce their own light and can switch off for black. That difference is normal and does not by itself prove that a display is faulty.
Important: This page helps with visual inspection only. It cannot calibrate a display, measure contrast, confirm warranty eligibility or repair damaged hardware.
Every control explained
Choose the right black screen setting
The default is pure black. The extra controls let you match the screen to a test, room or downloadable image without opening another app.
Presets
Pure Black starts at #000000. Softer presets use a slightly lighter black when pure black is too harsh or when you want a dim background rather than a display test.
Shade
The five blocks reduce the selected color to 100, 75, 50, 30 or 15 percent. Use them to compare near black levels or lower the visible output of a custom color.
Pick and recent colors
Choose any color with the picker or enter a six digit HEX value. The tool keeps up to four recent colors in this browser so you can return to them quickly.
Compare A/B
This splits the preview between the previous color and the current color. It is useful when two dark shades look almost identical on their own.
Keep awake
When enabled, the tool asks a supported browser to keep the display from dimming while fullscreen is active. Device settings, battery saving or browser support may still override the request.
HEX, RGB and HSL
These show the same color in three common formats. Select a value to copy it for design work, CSS or another color tool.
Fullscreen
Fullscreen removes the normal page around the color. Press F or select the preview to enter, then press Escape or select the screen again to leave.
Download PNG
Choose 480p, 720p, 1080p, 1440p, 4K, 8K, phone, tablet, square or your current screen size. The image is created locally in the selected color.
Useful beyond testing
Practical ways to use a fullscreen black background
Darken a second monitor
Place the full black screen on a monitor you are not using while you watch a film, play a game or work on the other display. This blank screen keeps the unused display dark, while Keep awake can stop it from locking during a presentation or long task.
See dust before cleaning
A dark field can make dust, fingerprints and streaks easier to locate. Use it only to inspect the surface. Turn the display off and follow the maker's instructions before applying a cloth or liquid.
Create a photo or video backdrop
A black display can act as a small dark background for product photos or as negative fill near a subject. It will not replace a large nonreflective backdrop, but it can help with close shots.
Cover an unused projector image
Use a black field between slides or clips when you want less visual distraction. Many projectors still emit light while showing black, so the room may not become completely dark.
Download a black screen image or wallpaper
Save a ready made black screen image for a desktop, phone, tablet, video frame or presentation. The PNG can also be used as a plain black screen wallpaper or background. Match my screen uses the dimensions reported by the browser and accounts for the pixel ratio, which tells the browser how many physical pixels make up one screen unit.
Compare dark interface colors
Enter a custom HEX value, then use Compare A/B to place it beside the previous shade. The copied values make it easy to move the chosen color into a design file.
Continue the display check
Use several solid fields before deciding that a pixel or panel has a fault.
Common questions
Black screen FAQ
What is the HEX code for pure black?
Pure black is #000000, which is RGB 0, 0, 0. This tool opens with that exact browser color value.
How do I make the black screen fullscreen?
Click the black preview, select Fullscreen, or press F. Press Escape to leave fullscreen. Fullscreen availability can depend on the browser and how the page was opened.
Can a black screen find dead or stuck pixels?
A black field can make pixels that remain bright easier to see. It cannot confirm every pixel fault by itself, so compare black with white, red, green and blue fields before reaching a conclusion.
Why does black look gray on my screen?
Many LCD screens use a backlight that stays on behind the image, so black may look slightly gray, especially in a dark room. Brightness, viewing angle, local dimming and room reflections can also change what you see.
Does this black screen repair pixels or screen burn in?
No. It is a visual inspection tool and cannot repair display hardware, guarantee a stuck pixel recovery or remove permanent burn in.
Does Keep awake work on every device?
Keep awake asks a supported browser to prevent the display from dimming while the fullscreen tool is active. A browser or device may refuse or release that request because of battery settings, permissions or an inactive tab.
Is any screen information uploaded?
No. Color changes, comparisons and PNG creation happen in your browser. The tool does not capture or upload your display.