How do I cycle between test patterns?

Use the pattern buttons in the controls panel or press the 1–6 number keys on your keyboard.

What does the gray step pattern check?

It checks whether your monitor can distinguish subtle near-black shades (0% to 5%) and near-white shades (95% to 100%) without clipping.

Monitor Test — Gradients, Sharpness, Uniformity & Banding

White ScreenMost Popular

Instant fullscreen pure white screen (#FFFFFF). Zero ads or popups. Perfect for monitor cleaning, dead pixel detection, reading light, and video illumination.

color

Black ScreenOLED Friendly

Instant fullscreen true black screen (#000000). Turn off OLED pixels, test for backlight bleed on IPS displays, rest your eyes, or save energy.

color

Red Screen

Fullscreen vibrant red screen (#FF0000). Preserve night vision, create darkroom mood lighting, or test your display for dead or stuck red subpixels.

color

Green Screen

Fullscreen pure chroma green (#00FF00). Great for chroma key backdrops, video keying tests, and inspecting display green subpixels.

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Blue Screen

Clean solid deep blue screen (#0000FF). Test blue OLED degradation, create cool atmospheric lighting, or test blue subpixel health.

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Yellow Screen

Bright warm yellow fullscreen display (#FFFF00). Perfect for gentle reading light, evening ambience, and colour uniformity checks.

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Orange Screen

Vibrant warm orange fullscreen display (#FFA500). Sunset tones for cozy ambient room lighting, relaxing monitor lamp, and display diagnostics.

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Pink Screen

Soft and vibrant pink fullscreen screen (#FF69B4). Aesthetic backdrop for TikTok/Reels, pastel mood lighting, and monitor checking.

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Purple Screen

Rich royal purple fullscreen screen (#800080). Create dramatic mood lighting, test display colour accuracy, or enjoy aesthetic desktop vibes.

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Cyan Screen

Clean electric cyan screen (#00FFFF). Test monitor colour balance, light up your desk with cool aqua vibes, or inspect subpixels.

color

Gray ScreenHardware Test

Precise 50% mid-gray fullscreen screen (#808080). Test monitor uniformity, dirty screen effect (DSE), banding, and color temperature consistency.

color

HEX

Custom Colour ScreenCustom Tool

Pick any custom fullscreen colour using an interactive colour wheel or hex/RGB code. Share your exact colour with custom shareable links (?c=).

color

Zoom Lighting ScreenVideo Call Tool

Transform your computer display into a soft key light for Zoom, Teams, and Google Meet. Features colour temperature slider (warm to cool) and brightness controls.

light

Virtual Ring Light ScreenVirtual Ring Light

Free fullscreen virtual ring light tool. Adjustable circular light ring with custom diameter, ring thickness, warm/cool temperature, and brightness.

light

LIGHT

Screen Light & Colour CalibratorStudio Light

Customizable full-screen lighting tool with color temperature slider (2700K–6500K), manual red/green/blue RGB fine-tuning, and one-click mood presets.

light

Win 11

Windows 11 Fake Update ScreenWindows 11

Realistic fake Windows 11 "Working on updates" full-screen prank. Authentic Segoe UI type, animated fluent spinning progress ring, and customizable percentage.

update

Win 10

Windows 10 Fake Update ScreenWindows 10

Hyper-realistic fake Windows 10 update screen. Deep blue background (#0067b8), circling white dot animation, and plausible percentage counting.

update

Win XP

Windows XP Fake Update ScreenNostalgic XP

Nostalgic fake Windows XP update screen with classic royal blue wallpaper, iconic segmented green/blue progress bar, and vintage typography.

update

Win 7

Windows 7 Fake Update ScreenWindows 7

Realistic fake Windows 7 update screen. "Configuring Windows updates. 35% complete. Do not turn off your computer." with rotating glowing light orb animation.

update

Win 8

Windows 8 Fake Update ScreenWindows 8

Faithful fake Windows 8 / 8.1 update screen with clean solid purple/blue Metro background, circling dots, and "Configuring Windows updates" text.

update

macOS

macOS Fake Update ScreenmacOS

Realistic fake Apple macOS update screen. Pitch black background with white Apple logo silhouette and clean minimalist progress bar.

update

Mac OS X Classic Fake Update ScreenMac OS X Classic

Vintage Mac OS X update screen with classic striped/linen background, spinning Aqua gear, and "Installing software updates..." progress dialog.

update

Ubuntu

Ubuntu Linux Fake Update ScreenUbuntu Linux

Authentic Ubuntu Linux upgrade screen. Deep purple/aubergine background with glowing orange Ubuntu logo and animated pulse dots.

update

Chrome

Chrome OS Fake Update ScreenChrome OS

Realistic fake Chromebook update screen. Clean white/grey backdrop with Google Chrome circular logo and modern progress animation.

update

Android

Android Fake Update ScreenAndroid OS

Realistic Android OS system update screen with smooth circular spinning progress gear, "Installing system update...", and percentage counter.

update

iOS

iPhone iOS Fake Update ScreeniOS Update

Authentic iOS software update screen with centered Apple silhouette, smooth white progress bar on pitch black, and realistic progress pacing.

update

:(

Windows Blue Screen of Death (BSOD)BSOD Prank

Realistic fake Windows 10/11 Blue Screen of Death (BSOD) prank screen. Authentic sad face emoticon, progress percentage counter, QR code, and stop code.

prank

*** STOP

Windows XP Blue Screen of DeathRetro BSOD

Vintage Windows XP blue screen of death crash simulator. Authentic monospaced font, DRIVER_IRQL_NOT_LESS_OR_EQUAL stop codes, and physical memory dump.

prank

Broken Screen PrankCracked Glass

Hyper-realistic cracked and shattered glass screen effect. Interactive canvas generates organic spiderweb cracks, glass shards, and impact points wherever you click.

prank

>_ code

Hacker SimulatorCyber Terminal

Simulate elite Hollywood hacking by typing any keys on your keyboard. Streams authentic C source code, assembly, cryptographic hashes, and network traces.

prank

CALL

Fake Video Call ScreenIncoming Call

Harmless incoming video call mockup with pulsing avatar, accept/decline buttons, and realistic ring UI. Zero camera or microphone permissions needed.

prank

Radar Screen SimulatorRadar Canvas

Authentic circular radar display with glowing green phosphor sweep beam, distance range rings, azimuth degrees, and blip detection fading trails.

prank

macOS Kernel Panic ScreenMac Crash

Realistic simulation of the classic macOS multilingual kernel panic curtain. "You need to restart your computer" in English, French, German, and Spanish.

prank

Panic

Linux Kernel Panic ScreenLinux Crash

Authentic Linux kernel panic terminal dump screen. Realistic kernel stack trace, register dumps, and flashing error cursor.

prank

GLITCH

Screen Glitch EffectGlitch Canvas

Fullscreen digital glitch and retro VHS tracking distortion canvas. Simulates horizontal displacement, chromatic aberration, and scanlines without rapid strobe.

prank

DVD

DVD Bounce ScreensaverCorner Hit

The legendary bouncing DVD video logo screensaver that bounces across your screen and flashes on corner hits. Customize text, speed, and vibrant neon colors.

screensaver

12:00

Flip Clock ScreensaverSplit-Flap Clock

Elegant retro mechanical flip clock with realistic split-flap card animation. Toggle 12h/24h time, seconds display, and dark/light minimalist aesthetics.

screensaver

BARS

No Signal Color Bars ScreensaverSMPTE Bars

Authentic SMPTE television color test bars with optional floating "NO SIGNAL" badge and CRT scanline overlay. Perfect for retro broadcast vibes and display testing.

screensaver

0101

Matrix Rain ScreensaverMatrix Rain

Hypnotic falling green digital code rain stream screensaver in 60fps canvas. Features katakana glyphs, adjustable speed, font size, and classic matrix colors.

screensaver

“ ”

Motivational Quotes ScreensaverDaily Wisdom

Fullscreen rotating collection of stoic, philosophical, and inspiring quotes from Marcus Aurelius, Seneca, Lao Tzu, and timeless thinkers with smooth fade transitions.

screensaver

✦ ✦

Starfield ScreensaverWarp Speed

Iconic 3D warp speed flying stars space simulator screensaver. Smooth 60fps perspective canvas with adjustable speed, star count, and warp streak effects.

screensaver

3D Pipes ScreensaverGenerative Pipes

Original generative 3D pipes screensaver. Watch multi-colored isometric jointed pipes snake, branch, and navigate through 3D space with authentic lighting and shading.

screensaver

Analog Clock ScreensaverSwiss Dial

Crisp minimalist Swiss railway-inspired analog clock screensaver. Precision hour markers, bold hands, smooth sweeping red second hand, and dark/light themes.

screensaver

><(((o>

Aquarium ScreensaverAquatic Zen

Calm, peaceful virtual aquarium screensaver with animated tropical fish, drifting seabed flora, rising air bubbles, and underwater ambient sunlight rays.

screensaver

Dead Pixel TestDiagnostic Tool

Free fullscreen dead pixel test tool. Cycles pure solid test colours (White, Black, Red, Green, Blue, Cyan, Magenta, Yellow) on click or auto-timer.

utility

Monitor Test & Display DiagnosticsDisplay Suite

Comprehensive monitor test patterns for gamma, sharpness, color banding, and viewing angles.

utility

Screen Burn-in FixerPixel Exerciser

Safe, gentle full-screen pixel cycling exerciser. Designed to soften temporary image retention and ghosting on OLED and LCD displays without rapid, dangerous flashing.

utility

25:00

Fullscreen Countdown TimerPresentation Timer

Huge high-contrast fullscreen digital countdown timer. Features quick presets (5m, 10m, 15m, 25m Pomodoro, 45m), custom duration, pause/resume, and gentle sound chime.

utility

12:00

Fullscreen Digital ClockDesktop Clock

Massive, clean fullscreen digital clock. Features 12h/24h formats, optional seconds display, date banner, dark/light themes, and pixel-crisp Geist typography.

utility

Monitor Test & Display Diagnostics

Key Highlights

What People Use Monitor Test & Display Diagnostics For

Calibrating New Displays

Testing DisplayPort / HDMI Cables

Monitor Test & Display Diagnostics FAQs

Dead Pixel Test

Gray Screen

White Screen

Black Screen

Monitor Test & Display Diagnostics

Key Highlights

What People Use Monitor Test & Display Diagnostics For

Calibrating New Displays

Testing DisplayPort / HDMI Cables

Monitor Test & Display Diagnostics FAQs

Related Screens

Dead Pixel Test

Gray Screen

White Screen

Black Screen