Click to enter fullscreen
Check for dead pixels, bright spots and dark spots
Screen colors
One hub for every solid color. Use the selector for quick checks, go fullscreen with F, scan for dead pixels and bleed, and download PNG wallpapers at any size.
Free online screen color hub
Switch colors in this tool for quick inspection — fullscreen solid colors for dead pixels, bleed, and uniformity checks.
Pixel-level dead pixel detection
Multi-color fullscreen frame-by-frame scanning to locate bright spots, dark spots, and stuck pixels. Cycle 8+ solid colors with keyboard shortcuts so every abnormal pixel stands out.
20+ screen test tools
Dead pixels, backlight bleed, greyscale, refresh rate, ghosting, HDR, and more — all linked from this hub.
Free · no download
Runs entirely in the browser on phones, tablets, laptops, desktop monitors, and TVs. No account or driver install.
Export any size
Download solid-color PNG wallpapers at preset or custom dimensions — handy for calibration references, presentations, and clean desktop backgrounds.
Color Pages
Open a dedicated fullscreen page for each priority color — with its own guide, instructions, and testing tips.
- Purple Screen Evaluate color consistency, hue balance, and red–blue channel blending. Also useful for creative lighting and display color checks.
- Black Screen Inspect backlight bleed, OLED black levels, IPS glow, and bright or stuck pixels against a dark background.
- White Screen Identify dead pixels, dark spots, stuck pixels, and uneven brightness across a white display background.
Why TestMyGears for display testing
Pixel-perfect precision
Pure color fullscreen plus F11 or F key ensures test patterns cover every physical pixel. Keyboard shortcuts leave no defect undetected.
All devices supported
Phones, tablets, laptops, desktop monitors, TVs — any device with a screen. Open the browser and test.
Complete test coverage
Dead pixels, backlight bleed, greyscale, color accuracy, gamut, refresh rate, ghosting, blooming — 20+ professional tools.
How to get started
Three steps to fully understand your screen's quality.
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Choose a test color
Pick white, black, or RGB from the color picker — or enter a custom hex. Beginners: start with white for dark dead pixels, then black for bright stuck pixels.
Tip Use ← → arrow keys to switch colors in the preview
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Go fullscreen (F)
Press F or click the preview for browser fullscreen. Pure color patterns cover the entire screen. Use Start pixel test to auto-cycle five colors.
Tip Press Esc to exit fullscreen
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Review & judge
Look for dark dots on white, bright dots on black, uneven tint, or backlight bleed. Compare corners to center. Download a PNG if you need a reference wallpaper.
Tip Run the dead pixel test for a guided color sequence
Core testing tools
Continue your display QA with these linked diagnostics.
Dead pixel test → Solid-color fullscreen frame-by-frame scan. Detects bright, dark, and stuck pixels — the essential first step. Backlight bleed test → Pure black fullscreen in a dark room to detect LCD leakage and IPS glow. Color calibration test → Gamma ramps and greyscale steps for accuracy checks. Color gamut test → sRGB vs Display P3 patches for wide-gamut verification. Refresh rate test → Real-time Hz detection to verify your panel's actual refresh rate. Ghosting test → Moving blocks for response time and grey-to-grey transition speed. Uniformity test → Grey fields and grid overlay for vignette and tint checks. Display test center → Hub for customizable display QA — gradients, HDR, flicker, and more.
Screen testing tips
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Warm up 15–30 min
Let the panel reach stable temperature before judging color tint or bleed — cold LCDs look different than warm ones.
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Disable enhancements
Turn off Vivid mode, dynamic contrast, and HDR for baseline pixel tests. Re-enable later for real-world viewing checks.
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Use native resolution
Set OS scaling to 100% (or native HiDPI) so fullscreen patterns map to physical pixels without interpolation.
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Use proper cables
High refresh and 4K need capable HDMI or DisplayPort cables. A weak link caps refresh or adds banding.
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Dark room for bleed
Backlight bleed and IPS glow are easiest to see on pure black in a dim room at moderate brightness.
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Judge at normal distance
Inspect corners from your usual viewing distance — nose-to-glass exaggerates glow that may not matter in daily use.
Specialized testing workflows
Step-by-step guides for devices, panel types, and color testing.
Fullscreen color test guide → Setup checklist, color sequence, and common mistakes for solid-field QA. Dead pixel how-to → White, black, and RGB passes with return-window documentation tips. Screen uniformity guide → Grey-field vignette, banding, and dirty-screen effect checks. Resolution & DPR guide → Verify native pixels, viewport, and device pixel ratio before pixel tests. Laptop screen test → 8-step laptop inspection flow. PWM flicker, gamut issues, and panel lottery — all covered. Mobile screen test → OLED burn-in, touch dead zones, PWM flicker — essential for used phone inspection. TV screen test → Mini LED blooming, backlight bleed, MEMC checks — must-do after new TV unboxing. Monitor screen test → IPS, VA, and OLED panel testing, PPI verification, and G-Sync/FreeSync validation. OLED screen test → Burn-in, PWM, ABL, black crush — comprehensive OLED-specific issue coverage. LCD screen test → IPS bleed, VA ghosting, Mini LED blooming — complete LCD panel evaluation.
Use cases
New device inspection
First thing after unboxing — dead pixels, bleed, and color accuracy. Find issues within the return window for easy exchanges.
Used devices
Pre-purchase screen check. OLED: burn-in. LCD: bleed. Verify the panel has not been swapped for a non-original part.
Design & color work
Confirm color accuracy and gamut coverage. 100% sRGB is the minimum; wide P3 is preferred before calibrating.
Gaming optimization
Verify refresh rate, response time, and VRR. Catch the "144Hz advertised, 60Hz actual" problem early.
Screen colors FAQs
What is a white screen test?
A white screen test fills your display with pure white (#FFFFFF) so you can check for dark dead pixels, backlight bleed, and color tint. TestMyGears runs a free white screen test online in your browser — click the preview for a full white screen instantly.
How do I get a white screen online?
Open this page on any device and click the preview or Enter fullscreen. You get a full white screen online with no download or app — works on desktop, MacBook, iPad, and mobile browsers.
Can I download a white screen wallpaper or photo?
Yes. Pick a resolution (1080p, 4K, 8K) or enter custom dimensions, then click Download PNG to save a white screen wallpaper or white screen photo file to your device.
How do I use a white screen as light?
Enter fullscreen on this page and place your phone or laptop near your face — the bright white screen works as soft fill light for video calls, selfies, and recordings. Lower brightness for comfort.
How do I run a white screen test for dead pixels?
Open fullscreen and look for dark or colored dots on the pure white background. Click Start pixel test to auto-cycle white, black, red, green, and blue every 5 seconds, or compare with our black screen for stuck pixels.
Is this a white screen YouTube video?
No. TestMyGears is an interactive white screen online tool — not a YouTube video. You get an instant full white screen in your browser with download and pixel-test options built in.
Why do I see white dots on my iPad screen?
White dots on an iPad screen during normal use are often stuck pixels that stay on. They are easiest to see on a black screen, not white. Use this white screen test for overall brightness, then test on /black-screen for bright dots.
What causes a MacBook screen white tint?
MacBook screen white tint can come from True Tone, Night Shift, a warm color profile, or uneven panel backlight. Compare this fullscreen white view to a printed white reference; if tint varies by screen zone, note it for a display check.
Does it work on mobile?
Yes. TestMyGears works in mobile browsers on phones and tablets including iPad — tap the preview for a full white screen online.
Pixel-perfect precision for every screen
Whether you're inspecting a new display, testing a second-hand monitor, or diagnosing OLED burn-in, TestMyGears provides accurate screen testing tools — free, in your browser.
