Turn any screen into exactly what you need
ScreenBG is a free collection of fullscreen browser tools — color and dead-pixel screen tests, screen lights for video calls, animated wallpapers, realistic system and update screens, a fullscreen QR code generator, and big clocks and timers. No sign-up, nothing to install, and everything loads instantly.
Popular tools
White Screen
Fill your whole display with pure white in one click.
Dead Pixel Test
Cycle full-screen colors to find dead and stuck pixels fast.
Matrix Rain Screen
The classic falling green code rain, live and fullscreen.
Quotes Wallpaper
Rotating quotes over a live, customizable background.
Windows Update Screen
A convincing Windows-style update screen you fully control.
QR Screen
Generate a big, scannable fullscreen QR code instantly.
Digital Clock
A giant, crisp digital clock for any screen.
Digital Timer
A big digital countdown timer for any screen.
Display & Light Tools
Solid color screens, or turn your display into a soft light source.
White Screen
Fill your whole display with pure white in one click.
Black Screen
Turn your whole display solid black in one click.
Red Screen
Fill the display with solid red to test color and pixels.
Green Screen
Fill the display with solid green for color and pixel checks.
Blue Screen
Fill the display with solid blue for color and pixel checks.
Gradient Background
A still, fullscreen color gradient from curated palettes.
Zoom Light
Use your screen as an adjustable key light for video calls.
Selfie Light
A bright, adjustable fullscreen light for selfies and makeup.
Warm Light
A soft, warm fullscreen light that's easy on the eyes.
Cool Light
A crisp, cool daylight fullscreen light for focus and photos.
Animated Wallpapers
Live fullscreen backgrounds for ambience and focus.
Matrix Rain Screen
The classic falling green code rain, live and fullscreen.
Gradient Wallpaper
Smooth, slowly shifting animated color gradients.
Particle Wallpaper
Floating, connecting dots for a clean sci-fi ambience.
Coding Screen
Auto-typing code that looks like a busy programmer at work.
Ambient Dark Screen
A slow, breathing dark glow for a relaxed ambience.
Fire Screen
A realistic animated flame for a cozy fireplace feel.
Rain Screen
Calming animated rainfall for focus and sleep.
Snowfall Screen
Gentle drifting snowflakes for a wintry, festive mood.
Space Travel
Fly through space at warp speed past streaking stars.
Quotes Wallpaper
Rotating quotes over a live, customizable background.
DVD Logo Bounce
The nostalgic DVD logo bouncing around your screen.
Lava Lamp
Smooth glowing blobs floating up and down.
Hypnosis Screen
A spinning black-and-white spiral optical illusion.
Live Audio Visuals
Live audio-reactive EQ bars and cosmic wave animations.
System & Simulation
Realistic, fully controllable system & status screens.
Windows Update Screen
A convincing Windows-style update screen you fully control.
macOS Update Screen
A clean macOS-style install screen you fully control.
Server Down Screen
A clean 'down for maintenance' status screen.
Loading Screen
A minimal fullscreen loading screen you control.
No Signal Screen
A retro TV 'No Signal' and color-bars screen.
Pranks & Fake Screens
Harmless gag screens for pranks, demos, and reactions.
QR Tools
Generate fullscreen QR codes anyone can scan.
Clocks & Timers
Big, beautiful fullscreen clocks and timers.
Digital Clock
A giant, crisp digital clock for any screen.
Analog Clock
A clean analog clock with smooth sweeping hands.
Flip Clock
A retro split-flap flip clock with animated cards.
Digital Timer
A big digital countdown timer for any screen.
Analog Timer
A visual analog countdown that empties as time runs out.
Screen Tests
Find dead pixels and check backlight & color uniformity.
Dead Pixel Test
Cycle full-screen colors to find dead and stuck pixels fast.
Screen Uniformity Test
Check brightness and color evenness across the whole panel.
Ghosting Test
A fast-moving object to spot motion blur and ghosting trails.
Backlight Bleed Test
Pure black screen with corner markers to spot edge light leak.
Color Banding Test
Smooth gradients to reveal color banding and bit-depth limits.
Contrast Test
Shaded squares to calibrate black levels and white clipping.
Resolution Test
Live readout of resolution, viewport, DPI scaling, and aspect ratio.
Text Sharpness Test
Tiny text samples to judge subpixel rendering and clarity.
Overscan Test
A 1-pixel grid and corner circles to fix overscan and cropping.
Why ScreenBG?
Instant & lightweight
Static pages and minimal JavaScript mean tools open in well under a second — no loaders, no waiting.
Fullscreen-first
Every tool goes edge-to-edge with one click, with clean controls that get out of your way.
Customizable & private
Tweak text, color, theme and speed. Your preferences are saved locally — no account required.