What tests does the monitor test suite include?

Eight modes: (1) Solid colors — cycles primaries and white/black; (2) Gradients — checks color banding; (3) Dead pixels — white, black, and the three primaries; (4) Backlight bleed — pure black; (5) Contrast — gradient from black to white; (6) Sharpness — fine line patterns; (7) Text clarity — multiple font sizes; (8) Geometry — grid and concentric circles for distortion.

How long does the full test take?

A thorough check of all 8 modes takes about 5–10 minutes. A quick scan looking only for obvious defects takes 2–3 minutes. The checklist helps you track which modes you have completed.

What is the difference between this and the individual screen tools?

The monitor test is a quick all-in-one sweep designed to catch the most common issues. The individual tools (Dead Pixel Test, Backlight Bleed Test, Color Gradient Test, etc.) provide deeper functionality for each test type — speed controls, exerciser modes, comparison views — for when you need to investigate a specific issue.

Can I save or share my monitor health report?

The generated report is a plain text summary you can copy to your clipboard and paste into any email, ticket, or document. It lists the monitor model (if detectable via browser APIs), resolution, DPR, and your pass/fail results.

Why is my color gradient test showing visible steps instead of smooth gradients?

Color banding — visible steps in what should be a smooth gradient — typically indicates 8-bit color depth. To confirm, run the dedicated Color Gradient Test tool which simulates 8-bit vs dithered display modes side by side.

Should I test in the dark or with room lights on?

Most tests can be run under normal lighting. The backlight bleed and black level tests are most revealing in a dark room — turn off room lights and wait 30 seconds for your eyes to adjust before assessing those screens.

Monitor Test

All-in-one monitor test: dead pixels, gradients, sharpness, contrast, backlight, geometry, and more.

Last updated: April 2026

White — 1/8

←/→ navigate · C checklist · F fullscreen

What it does

8 Test Modes

Switch between solid colors, gradients, dead pixel, backlight bleed, contrast, sharpness, text clarity, and geometry tests — all accessible via arrow keys without leaving fullscreen.

Pass/Fail Checklist

A collapsible checklist lets you mark each test as pass, fail, or skip. When you finish, click "Generate Report" for a text summary you can copy to email or a warranty claim.

Linked Deep-Dive Tools

Each test mode shows a link to the dedicated screen tool for that test type — e.g., the dead pixel test links to /tools/dead-pixel-test for the full 8-color exerciser suite.

Keyboard Navigation

Left and right arrow keys cycle through test modes without touching the screen — useful when evaluating from a distance or with gloved hands.

No Installation

Runs entirely in the browser, works offline after first load, and sends no data anywhere. Ideal for IT departments testing multiple workstation monitors.

How to use Monitor Test

1
Open the tool
Navigate to devzone.tools/tools/monitor-test.
2
Enter fullscreen
Click "Start Tests" to enter fullscreen mode.
3
Navigate test modes
Press left/right arrow keys or swipe to cycle through all 8 test modes. Spend 30 seconds on each.
4
Mark results
Open the checklist overlay (press C or tap the checklist icon) and mark each test pass, fail, or skip.
5
Generate report
After reviewing all modes, click "Generate Report" in the checklist. Copy the text summary for your records.

When to use this

New monitor setup

Run all 8 tests on a new display before committing. The checklist ensures you cover every aspect — from pixel defects to color gradient banding — before the return window closes.

IT department batch testing

System administrators testing multiple monitors can run through all tests quickly with arrow-key navigation and generate a text report per monitor for asset documentation.

Pre-purchase used monitor evaluation

When evaluating a used monitor in person, load the monitor test on the seller's browser for a systematic check in 5 minutes.

Periodic maintenance check

Schedule quarterly display checks for workstations where color accuracy matters — design, photo editing, medical imaging — to catch degrading monitors before they affect work quality.

Customer support documentation

Support teams can guide customers through the monitor test remotely with step-by-step instruction, then have them email the generated report.

What to Test When You Buy a New Monitor

A systematic monitor test takes less than 10 minutes but can save you weeks of frustration with a defective display. The most critical test for a new monitor is the dead pixel check — run it immediately, in the first 24 hours, before the easy return window closes. Next, test backlight bleed in a darkened room, which reveals manufacturing quality more clearly than any spec sheet. Finally, run the gradient test to confirm the panel can display smooth color transitions — banding on gradients usually indicates a budget 6-bit panel using dithering rather than a true 8-bit panel.

Understanding Monitor Panel Types and Their Testing Implications

IPS (In-Plane Switching) panels offer wide viewing angles and accurate color but are prone to IPS glow and moderate backlight bleed. Test them at an angle to assess glow. VA (Vertical Alignment) panels have excellent contrast and deep blacks but suffer from smearing on fast motion. Test them with the refresh rate test. TN (Twisted Nematic) panels have fast response times but poor color accuracy and narrow viewing angles. Test them head-on and then at 45 degrees to see how badly colors shift. OLED panels offer perfect blacks and infinite contrast but require a dead pixel test for any uniformity issues.

Frequently Asked Questions

What tests does the monitor test suite include?: Eight modes: (1) Solid colors — cycles primaries and white/black; (2) Gradients — checks color banding; (3) Dead pixels — white, black, and the three primaries; (4) Backlight bleed — pure black; (5) Contrast — gradient from black to white; (6) Sharpness — fine line patterns; (7) Text clarity — multiple font sizes; (8) Geometry — grid and concentric circles for distortion.
How long does the full test take?: A thorough check of all 8 modes takes about 5–10 minutes. A quick scan looking only for obvious defects takes 2–3 minutes. The checklist helps you track which modes you have completed.
What is the difference between this and the individual screen tools?: The monitor test is a quick all-in-one sweep designed to catch the most common issues. The individual tools (Dead Pixel Test, Backlight Bleed Test, Color Gradient Test, etc.) provide deeper functionality for each test type — speed controls, exerciser modes, comparison views — for when you need to investigate a specific issue.
Can I save or share my monitor health report?: The generated report is a plain text summary you can copy to your clipboard and paste into any email, ticket, or document. It lists the monitor model (if detectable via browser APIs), resolution, DPR, and your pass/fail results.
Why is my color gradient test showing visible steps instead of smooth gradients?: Color banding — visible steps in what should be a smooth gradient — typically indicates 8-bit color depth. To confirm, run the dedicated Color Gradient Test tool which simulates 8-bit vs dithered display modes side by side.
Should I test in the dark or with room lights on?: Most tests can be run under normal lighting. The backlight bleed and black level tests are most revealing in a dark room — turn off room lights and wait 30 seconds for your eyes to adjust before assessing those screens.

Related Tools

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Dead Pixel Test

Cycle through 8 solid colors to find stuck or dead pixels on any monitor, TV, or phone screen.

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Backlight Bleed Test

Check your LCD or OLED monitor for backlight bleeding and IPS glow using a pure black fullscreen display.

blur_on

Color Gradient Test

Test your monitor for color banding and 8-bit vs 10-bit depth with smooth gradients across grayscale, red, green, blue, and hue channels.

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Refresh Rate Test

Measure your display's actual refresh rate with requestAnimationFrame, test motion smoothness, and compare 60/120/144/240 Hz visually.