What is the difference between a dead pixel and a stuck pixel?

A dead pixel is completely powered off and appears black on all colored backgrounds. A stuck pixel has one or two sub-pixel transistors locked in an 'on' state, appearing as a persistent bright red, green, or blue dot.

What is backlight bleed vs IPS glow?

Backlight bleed is physical light leaking around the bezel edges due to improper frame pressure. IPS glow is an inherent optical characteristic of In-Plane Switching liquid crystals that shifts when viewed from different angles.

How do I exit fullscreen mode?

Press the 'Escape' (Esc) key on your keyboard at any time, or tap the close button on mobile touchscreens.

Can this tool fix stuck pixels?

While this tool is primarily for detection, rapid sub-pixel color cycling can sometimes unstick locked liquid crystal transistors. However, physical dead pixels cannot be repaired by software.

Monitor Dead Pixel & Backlight Bleed Tester

Display Diagnostics

Detect dead or stuck pixels, inspect backlight bleeding, IPS glow, and screen uniformity across full-screen color calibrations.

Monitor Dead Pixel & Backlight Bleed Tester

Full-screen RGBW color calibration, stuck sub-pixel isolation, backlight bleed audit, and color banding tests.

3/3 Free Daily Uses

Pure Red(Inspect Red Sub-Pixels)

Pattern 1 of 11

Select Calibration Screen

Click any card to inspect

Screen Inspection Certificate & Defect Logger

I spotted dead or stuck pixels / backlight bleed

Tool Overview & Guide

What is Monitor Dead Pixel & Backlight Bleed Tester?

Test your monitor, laptop screen, smartphone, or tablet for dead pixels, stuck sub-pixels, backlight bleeding, and IPS glow. Switch through full-screen laboratory RGBW calibration colors and contrast patterns with keyboard or click navigation. 100% in-browser with zero software installation.

Technical Specifications & Supported Formats

Processing Engine:Client-side Native JavaScript & WebAssembly

Privacy & Security:100% In-Browser (Zero File Upload)

Supported Formats:All Standard Formats & Code Text

Max File Limit:100 MB

How to use Monitor Dead Pixel & Backlight Bleed Tester

3 simple steps to complete your task directly in your browser:

Launch Fullscreen Test
Click 'Launch Fullscreen Test' to hide all browser chrome, taskbars, and address bars for complete edge-to-edge inspection.
Cycle Calibration Colors
Press Spacebar, Left/Right Arrow keys, or click anywhere on screen to cycle through Red, Green, Blue, White, Black, Warm Gray, Cyan, and Magenta.
Inspect For Pixel Faults
Look closely for dead pixels (permanently dark/black spots on bright backgrounds) or stuck sub-pixels (glowing red, green, or blue dots on dark backgrounds).

Common uses

New Monitor & TV Inspection: Verify zero-defect warranties within store return windows.
Used Device Buyers: Thoroughly check laptops, MacBooks, tablets, and phones before completing second-hand purchases.
Photographers & Video Colorists: Check panel color uniformity and grayscale banding across the screen surface.
Hardware RMA Verification: Document dead pixel clusters to claim manufacturer panel replacements.

Why choose VersaTools

100% private

Your files are processed inside your browser and are never uploaded to a server.

Free, no account

No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.

Instant

No upload, no queue, no server round-trip — work starts the moment you drop a file.

Runs in your browser

Built on open web standards. Works on any modern desktop browser, nothing to install.

No upload size caps

Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.

Yours to keep

Results download straight to your device in clean, standard file formats.

Frequently asked questions

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