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Online Screen Test

Perform a professional screen test in seconds. Identify dead pixels, backlight bleed, and ghosting with our free, browser-based display calibration tool. No download required.

How To Test Your Monitor?

Get accurate PC bottleneck analysis in three simple steps. Our calculator uses performance benchmarks to identify hardware imbalances.

Select Tests

Choose which display tests to run from our comprehensive suite of monitor diagnostics.

Go Fullscreen

Enter distraction-free fullscreen mode for accurate test results.

Analyze Display

Carefully examine your screen for dead pixels, color issues, and other defects.

Get Results

Know your monitor's true capabilities and identify any potential issues.

Why Test Your Monitor?

Make informed hardware decisions with comprehensive analysis tools designed for gamers and PC enthusiasts.

Detect Dead Pixels

Find stuck, dead, or hot pixels that can ruin your viewing experience. Our dead pixel test cycles through solid colors to reveal any defective pixels on your screen.

Verify Color Accuracy

Ensure your monitor displays colors correctly with our color gradient and gamma tests. Essential for photographers, designers, and content creators.

Test Gaming Performance

Check for ghosting, motion blur, and response time issues. Our response time test helps gamers identify if their monitor is performing at peak levels.

Check Used Monitors

Before buying a used monitor, run our complete test suite to verify the display has no hidden defects. Protect your investment with thorough testing.

Complete Monitor Test Suite

Explore our comprehensive collection of monitor tests designed to evaluate every aspect of your display.

Test 01

Dead Pixel Test

The dead pixel test displays solid colors across your entire screen, making it easy to spot any pixels that are stuck, dead, or displaying the wrong color. Dead pixels appear as tiny black or colored dots that don’t change with the rest of the screen.

What to look for:

  • Black dots that don’t light up (dead pixels)
  • Colored dots stuck on one color (stuck pixels)
  • Bright white dots that won’t turn off (hot pixels)

Test 02

Uniformity Test

The uniformity test helps you identify uneven lighting across your monitor. This is especially important for LCD monitors where backlight bleeding and clouding are common issues. The test displays solid colors to reveal brightness inconsistencies.

What to look for:

  • Light patches in corners (backlight bleeding)
  • Cloudy or uneven areas across the screen
  • Color tinting in specific regions
     

Test 03

Response Time Test

Measure how quickly your monitor responds to pixel changes. High response times cause ghosting and motion blur, which is particularly noticeable in fast-paced games and videos. This test shows moving objects to reveal trailing artifacts.

What to look for:

  • Trailing shadows behind moving objects (ghosting)
  • Blurry edges during motion (motion blur)
  • Inverse ghosting or corona effects

Test 04

Color Gradient Test

The gradient test displays smooth color transitions to reveal banding issues. Color banding appears as visible steps or lines in what should be smooth gradients. This is crucial for photo editing and video production.

What to look for:

  • Visible bands or steps in gradients
  • Posterization effects in color transitions
  • Dithering patterns in smooth areas
     

Test 05

Gamma Test

Test your monitor’s gamma settings to ensure proper brightness reproduction. Correct gamma is essential for accurate image display. The test shows patterns that should appear uniform when gamma is properly calibrated.

What to look for:

  • Pattern visibility at different brightness levels
  • Shadow detail visibility (gamma too high/low)
  • Crushed blacks or washed-out highlights

Test 06

Viewing Angle Test

Evaluate how your monitor’s image quality changes when viewed from different angles. IPS panels offer better viewing angles than TN panels, but may exhibit IPS glow. This test helps you understand your display’s limitations.

What to look for:

  • Color shifting when viewed at angles
  • Brightness changes from off-center viewing
  • IPS glow in dark scenes (for IPS monitors)
     

Test 07

Sharpness Test

The sharpness test displays fine patterns and text to evaluate your monitor’s ability to render sharp details. This is important for reading text and viewing high-resolution content. Oversharpening can cause halos around edges.

What to look for:

  • Clear, crisp text without fuzzy edges
  • Fine lines and patterns without artifacts
  • Halos or ringing around high-contrast edges

Test 08

Color Distance Test

Measure your monitor’s ability to display subtle color differences. This test shows similar colors side by side to evaluate color accuracy and whether you can distinguish between close shades.

What to look for:

  • Ability to distinguish similar colors
  • Consistent color differentiation across the screen
  • Any merged or indistinguishable color pairs
     

Frequently Asked Questions

Everything you need to know about PC bottlenecks, performance optimization, and hardware compatibility.

A screen test is a diagnostic tool that helps you evaluate your monitor’s display quality. It checks for issues like dead pixels, backlight bleed, color accuracy, and response time. Running these tests ensures your display is functioning correctly for gaming, graphic design, or everyday use.

Select the ‘Dead Pixel’ test from our test suite and click Start. The test displays solid colors (black, white, red, green, blue) across your entire screen. Look carefully for any pixels that don’t match the displayed color—these are dead or stuck pixels. Navigate between colors using arrow keys or clicking.

 

Backlight bleed occurs when light leaks around the edges of an LCD screen, causing uneven brightness. Use our ‘Uniformity’ test in a dark room with a black screen displayed. If you see lighter areas around the edges or corners, your monitor has backlight bleed. Some bleed is normal, but excessive bleed may warrant a replacement.

 

No downloads required! Our screen test tool runs entirely in your web browser. Simply visit the site, select your tests, and click Start. It works on Windows, Mac, Linux, and even mobile devices. For best results, run tests in fullscreen mode.

 

For gaming: Focus on Response Time, Dead Pixel, and Viewing Angle tests. For graphic design: Run Gradient, Color Distance, Gamma, and Uniformity tests. For general use: The Dead Pixel and Uniformity tests are most important. When buying a used monitor, run all tests to ensure quality.

 

Yes! Our screen tests work on any device with a modern web browser, including smartphones, tablets, and laptops. The tests automatically adapt to your screen size. For mobile devices, rotate to landscape mode for better coverage of certain tests.

 

Ghosting appears as a trail or shadow behind moving objects on screen, caused by slow pixel response times. Our ‘Response Time’ test displays moving objects at various speeds. If you see trails or smearing behind the moving elements, your monitor may have ghosting issues—common in older or budget displays.

 

Test your monitor when you first purchase it (especially used monitors), after firmware updates, if you notice display issues, or every 6-12 months for routine maintenance. Dead pixels can develop over time, so periodic testing helps catch issues early while under warranty.
 
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