Full Black Screen

All color tools Free

Fill your whole screen with pure black: perfect for spotting bright stuck pixels, checking backlight bleed or as a distraction-free dark backdrop. Free.

Tap to open full screen

Pick a color

Press Esc to exit, or use the ← → arrow keys to switch colors while in full screen.

What is it for?

Find dead pixels
A solid field makes pixels that never light up easy to see: check each color in turn.
Find stuck pixels
On a black screen, sub-pixels stuck on bright stand out instantly.
Clean your screen
A bright, even white surface reveals dust, smudges and fingerprints as you wipe.
Lightbox & tracing
Turn your display into a backlight for tracing drawings or viewing slides.
Bias & fill light
Use a full color screen as ambient bias lighting or a soft fill light for calls.
Chroma-key backdrop
A pure green or blue screen works as a quick background for green-screen effects.

About Full Black Screen

The Full Black Screen tool fills your entire display with pure black (#000000). It is the standard test for stuck pixels (sub-pixels frozen in the on state glow as tiny bright red, green, blue or white dots against the dark field) and for judging how deep your panel’s blacks really are.

On LCD monitors, a black screen is the definitive backlight bleed test: in a dim room, uneven light leaking from the edges and corners becomes plainly visible. On OLED displays, where each pixel emits its own light, a true black screen should be indistinguishable from the panel being off.

Beyond testing, a pitch-black page makes a distraction-free backdrop: an ambient dark screen for a second monitor, a neutral background behind on-camera subjects, or simply the fastest way to blank a display without powering it off. It is free, browser-only, and exits with Esc.

How to use Full Black Screen

  1. Click the monitor preview or "Go full screen" to blacken the entire display.
  2. Dim the room lights for the most revealing test conditions.
  3. Look for bright dots (stuck pixels) and for light leaking from edges and corners (backlight bleed).
  4. Cycle to the other test colors with the ← → arrow keys, or press Esc to exit.

Frequently asked questions

A dead pixel never lights up and appears as a dark dot on bright backgrounds, while a stuck pixel has a sub-pixel frozen on, glowing red, green, blue or white against a black screen. Black screens expose stuck pixels; white screens expose dead ones.

Display the full black screen in a dark room at your normal brightness and look at the edges and corners of the panel. Patches of grayish light leaking through indicate backlight bleed: common on LCDs to some degree, but severe cases may justify a warranty claim.

Essentially like the display is switched off. OLED pixels emit their own light, so pure black means pixels fully off, no glow, no clouding. Any bright dot you see on an OLED black field is a defective pixel, not backlight bleed.

Yes: free, no account, and it runs entirely in your browser. The page just paints the screen black; nothing is transmitted or recorded.

Sometimes. Rapidly cycling colors over the affected area for a while can nudge a stuck sub-pixel back to life, and this page’s quick color switching (arrow keys) helps you recheck the spot between attempts. Dead pixels, by contrast, rarely recover.
Share this
Related Tools
Full White Screen
Full Green Screen
Full Blue Screen
Full Red Screen
RAL Color Matcher
Gradient Generator
Color Mixer
Web-Safe Color Palette
AI Theme & Gradient Generator
Screen Color Picker
Color Palette Generator
Color Code Converter
AI Brand Palette Generator
Color Blindness Simulator
Color Shades Generator
Pantone Color Matcher
Color Wheel & Harmony Generator
Export Color Palette
Font Pairing & Google Fonts Directory
Color Name Finder
Need help?
Found an issue with this tool? Let our team know.
Report an issue

Add this free tool to your own website: copy and paste the code below.