Pure patterns
Solid colours use exact RGB values with no image compression, opacity or decorative layers.
INDEPENDENT DISPLAY DIAGNOSTICS
An online screen test that shows the details.
Test any monitor, OLED TV, laptop or phone with precise fullscreen patterns for pixels, true black, gradients, uniformity and motion. No downloads, sign-up or visual interference.
Testing an OLED? Open the OLED screen check ↗ Or choose an individual test ↓- Exact browser values
- No ads during tests
- Runs locally
START FROM THE SYMPTOM
What are you seeing?
Pick what bothers you and go straight to the test built to examine it.
- A dot that never changes colourDead pixel test ↗
- Light leaking from the edges in dark scenesBacklight bleed & blooming ↗
- Halos around subtitles or bright objectsBacklight bleed & blooming ↗
- A faint logo or taskbar that stays on screenOLED burn-in ↗
- Stripes in skies, fog or dark gradientsColor banding ↗
- Dirty-looking patches when the camera pansScreen uniformity ↗
- Dark scenes look crushed or washed outContrast detail ↗
- Midtones look too dark or too flatGrayscale & gamma ↗
- Colours look dull or neon-brightColour & gamut ↗
- Blurry or colour-fringed textText clarity ↗
- Picture edges cut off on a TVSharpness & geometry ↗
- Blur, trails or a 144 Hz monitor that feels like 60 HzRefresh rate & motion ↗
THE TEST BENCH
One display. Twelve ways to look closer.
Start with the symptom you notice, or work through the complete set. Each test includes a clear method, interpretation and honest limitations.
Pixel inspection
Find dead, stuck and bright pixels.
Tone & colour
Gamma, gradients, colour and shadow detail.
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033 patterns
Grayscale & gamma
Neutral steps, a gamma chart and RGB channel tracking.
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045 patterns
Color banding
Reveal posterisation in smooth light and dark gradients.
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054 patterns
Colour & gamut
Colour bars, full spectrum, saturation and a wide-gamut check.
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093 patterns
Contrast detail
Black crush, white clipping and checkerboard contrast.
Panel health
Uniformity, OLED wear and LCD backlight.
Clarity & geometry
Scaling, overscan and text rendering.
Motion
Refresh rate, frame pacing and blur.
DESIGNED FOR THE MOMENT OF DOUBT
A useful answer, not just a coloured rectangle.
ScreenProbe pairs exact browser-generated patterns with practical guidance. It helps you distinguish a likely panel issue from viewing angle, source processing or a setting—without pretending a browser replaces measurement hardware.
Quiet fullscreen
Navigation, ads and branding disappear so you can inspect the panel without visual contamination.
Honest guidance
Every test explains what it can reveal, what can mislead you and when to verify elsewhere.
ONE TOOLKIT / MOST DISPLAYS
From pocket OLED to living-room Mini-LED.
Use ScreenProbe on monitors, televisions, laptops, phones and tablets. The right interpretation changes by panel type, so our instructions do too.
- OLED
- LCD / IPS
- VA
- Mini-LED
- TV
- Mobile
FAQ / 01—05
Good questions before you start.
01Can a website accurately test a display?
It can send controlled pixel values and reveal visible issues. It cannot measure colour accuracy, luminance or response time like dedicated hardware.
02Do I need to install anything?
No. The tests run directly in a modern browser and do not upload screen data.
03Should I use fullscreen?
Yes. Fullscreen removes surrounding references and browser chrome. Keep browser zoom at 100% for geometry and sharpness patterns.
04Which test should I start with?
Run the quick check first: it covers the most common problems in a few minutes and lets you mark anything suspicious. Then open the individual test for what you marked.
05Can these tests repair pixels or burn-in?
No. They help you observe and compare. ScreenProbe does not make repair claims.