⚡ STUCK PIXEL FIX

Rapidly cycling colours can sometimes revive stuck pixels. Run this directly over the affected area.

30

🔍 DEAD PIXEL TESTER

Advanced screen diagnostic tool. Test for dead, stuck and hot pixels across 9 solid colours, gradient and grid patterns. Mark defects, classify issues, and attempt stuck pixel repair — all in fullscreen.

🖥️
FULLSCREEN TEST
Fill your entire display with a single colour to spot anomalies
DETECTING… —
SELECT TEST COLOUR (15 COLOURS)
TEST PATTERNS (12 PATTERNS)
SOLID
GRADIENT
GRID
CHECKER
SUBPIXEL
RADIAL
SCANLINES
UNIFORMITY
CROSSHATCH
DOTS
SPECTRUM
VIGNETTE
AUTO-CYCLE
CYCLE SPEED 3s
LAUNCH OPTIONS
💡 Use keyboard arrows to cycle colours during test. Click to mark defects.
📍
DEFECT TRACKER
Marked pixel locations from your test session
0 MARKED NONE
MARKED PIXELS
NO DEFECTS MARKED
Click pixels during fullscreen test to mark them
PIXEL TYPE LEGEND
🔴 DEAD PIXEL
Always off — appears black on any colour. Transistor permanently failed. Usually cannot be fixed.
🟠 STUCK PIXEL
Always one colour (red, green, or blue). Can sometimes be fixed with rapid cycling.
⚪ HOT PIXEL
Always white/bright. Common in dark environments. May fade over time with use.
STUCK PIXEL REPAIR
⚠️ Pixel fix works only on stuck pixels, not dead ones. Results vary by display type.
📊 SCREEN INFORMATION DISPLAY ▸
📊
DISPLAY DIAGNOSTICS
Your screen's detected specifications
—
WIDTH (PX)
—
HEIGHT (PX)
—
TOTAL PIXELS
—
PIXEL RATIO
—
REFRESH RATE
—
COLOR DEPTH
—
ASPECT RATIO
—
ORIENTATION
DISPLAY CAPABILITIES
HDR & COLOUR SPACE
🎨 COLOUR UNIFORMITY TEST BACKLIGHT ▸
🎨
UNIFORMITY & BACKLIGHT BLEED
Detect uneven backlight, vignetting, and colour banding
ZONE TEST GRID — Click a zone to test it fullscreen
BACKLIGHT BLEED TEST
BRIGHTNESS RAMP TEST
🔦 FLICKER / PWM DETECTION TEST EYESTRAIN ▸
🔦
PWM FLICKER SENSITIVITY TEST
Detect backlight PWM flicker that causes eye fatigue and headaches
EYESTRAIN
💡 How it works: PWM-dimmed displays rapidly flicker their backlight. If you see a dashed line instead of solid line when waving your hand in front of a white screen, your monitor uses PWM. This test simulates flicker at different frequencies.
FLICKER FREQUENCY
DUTY CYCLE (BRIGHTNESS)
DUTY CYCLE 50%
LIVE PREVIEW
FULLSCREEN FLICKER TEST
⚠️ Photosensitivity warning. The flicker test uses rapidly alternating light levels. Do not use if you are sensitive to flashing lights or have a history of seizures.
📌 Tip: Wave a pencil or your hand quickly in front of the screen. A PWM display will create a dashed "stroboscopic" shadow. A flicker-free display creates a solid blur.
📉 GRADIENT BANDING TEST 8-BIT / 10-BIT ▸
📉
COLOUR DEPTH & BANDING ANALYSIS
Detect colour banding, posterisation, and dithering artefacts
BIT DEPTH
GRADIENT PREVIEWS — Click to test fullscreen
256-STEP GREYSCALE
RED RAMP (0→255)
GREEN RAMP (0→255)
BLUE RAMP (0→255)
HUE SWEEP (0→360°)
NEAR-BLACK SHADOW DETAIL
NEAR-WHITE HIGHLIGHT DETAIL
WHAT TO LOOK FOR
✓ GOOD — No Banding
A perfectly smooth transition from black to white with no visible steps or stripes. Indicates 10-bit panel or effective dithering.
✗ BAD — Banding
Visible horizontal stripes or "steps" in the gradient. Indicates 6-bit or 8-bit panel without effective dithering.
STEP COUNT TEST
Count visible steps in the greyscale gradient. An 8-bit display shows ~256 smooth steps. A 6-bit panel may show only 64 distinct bands. 10-bit panels appear perfectly smooth.
🎯 SHARPNESS & FOCUS TEST CLARITY ▸
🎯
PIXEL SHARPNESS & CONVERGENCE
Test panel sharpness, focus, and sub-pixel colour fringing
FOCUS
SHARPNESS PATTERNS — Click to launch fullscreen
1PX LINES
2PX LINES
H-LINES
CROSSHATCH
RGB CONV.
AaBbCcDd
1234567890
abcdefghijklmnop
TEXT
CIRCLES
DIAGONAL
${[8,6,4,2].map(s=>`
`).join('')}
BULLSEYE
FINE LINE SIZE
LINE WIDTH 1px
GRID SPACING
CELL SIZE 40px
CUSTOM LINE TESTS
◼◻ CONTRAST RATIO TEST DYNAMIC RANGE ▸
◼◻
CONTRAST & NEAR-BLACK/WHITE TEST
Test shadow detail, highlight clipping, and ANSI contrast
CONTRAST
ANSI CONTRAST CHECKERBOARD

A 4×4 alternating black/white checkerboard pattern. Measures simultaneous contrast — the ratio between white and black squares displayed at the same time.

SHADOW DETAIL (NEAR-BLACK)
${['#050505','#0a0a0a','#0f0f0f','#141414','#191919','#1e1e1e','#232323','#282828'].map((c,i)=>`
${c.toUpperCase()}
`).join('')}
HIGHLIGHT DETAIL (NEAR-WHITE)
${['#d7d7d7','#dcdcdc','#e1e1e1','#e6e6e6','#ebebeb','#f0f0f0','#f5f5f5','#fafafa'].map((c,i)=>`
${c.toUpperCase()}
`).join('')}
CONTRAST TESTS
🔥 BURN-IN / IMAGE RETENTION TEST OLED / AMOLED ▸
🔥
IMAGE RETENTION & SCREEN BURN TEST
Detect permanent or temporary burn-in on OLED/AMOLED panels
OLED
HOW THE TEST WORKS
STEP 1 — STRESSOR
Display a high-contrast static pattern for 30–60 seconds to create a temporary imprint in the display's phosphors or organic pixels.
STEP 2 — REVEAL
Switch to a flat mid-grey field. Any ghost image visible is image retention. On OLED panels, permanent burn-in will also be visible here.
⚠️ CAUTION
This test intentionally stresses OLED/AMOLED panels. Temporary retention is normal. Do not run extended stress tests on OLED displays as it may contribute to real burn-in.
STRESSOR DURATION
RETENTION TEST PREVIEW
CLICK TEST TO START
READY
After stressor finishes, a flat grey screen is automatically shown. Look for ghost outlines. If visible → image retention detected.
🌡️ COLOUR TEMPERATURE & TINT TEST WHITE POINT ▸
🌡️
WHITE POINT & COLOUR CAST TEST
Identify warm/cool tint, green push, or uneven white balance
WHITE POINT
COLOUR TEMPERATURE REFERENCE

Display each white point and compare. A monitor calibrated to D65 should appear neutral on the 6500K swatch. If it appears warm or cool your monitor's white point is off.

2700K
3200K
4000K
5000K
6000K
6500K
7500K
9300K
TINT / GREEN PUSH TEST
💡 A perfectly calibrated D65 monitor shows no colour cast on pure white (#FFFFFF). Any visible tint indicates white point deviation or gamma shift.
CUSTOM COLOUR TEMP
KELVIN (APPROX) 6500K
🚶 PIXEL WALK & SINGLE-PIXEL TEST ADVANCED ▸
🚶
WALKING PIXEL & LINE SCAN
A single illuminated pixel traverses the screen to find defects systematically
SCAN
PIXEL WALK OPTIONS

A single white pixel on a black background automatically traverses every pixel on the screen row by row. Any pixel that fails to illuminate or displays incorrectly will be immediately visible.

WALK SPEED
WALK PIXEL COLOR
PIXEL SIZE
DOT SIZE 2px
SCAN MODES
💡 During the pixel walk, any dark spot where the pixel should be bright = dead pixel. A stuck pixel may appear as a coloured dot in the wrong location.
⚙️ SETTINGS & CUSTOMIZATION 26 TABS ▸
⚙️
SETTINGS & CUSTOMIZATION
Appearance, overlay, crosshair, hotkeys, presets, notifications & more
↺ RESET
COLOUR SCHEME
CYBER
MATRIX
SOLAR
VIOLET
ICE
AMBER
ACCENT COLOUR
THEME & DISPLAY
DARK MODE
ANIMATED BACKGROUNDS
RAINBOW BORDERS
GLOW EFFECTS
FONT SIZE
ASMALL
ADEFAULT
ALARGE
UI DENSITY
▤COMPACT
▣NORMAL
▢SPACIOUS
HUD VISIBILITY
SHOW HUD DURING TEST
AUTO-HIDE HUD ON IDLE
SHOW COLOUR NAME IN HUD
SHOW PATTERN NAME IN HUD
SHOW COLOUR INDEX (1/15)
SHOW MARKER COUNT IN HUD
HUD TIMEOUT
HIDE AFTER3s
HUD OPACITY
OPACITY90%
OVERLAY GRID OPTIONS
DEFAULT GRID ON LAUNCH
SHOW PIXEL COORDINATES
GRID LINE COLOUR
GRID CELL SIZE
CELL SIZE40px
OVERLAY FADE-IN DURATION
FADE150ms
COLOUR TRANSITION
COLOUR CHANGE SPEED0ms
CROSSHAIR STYLE
CROSSHAIR COLOUR
CROSSHAIR SIZE
SIZE20px
STROKE WIDTH
THICKNESS2px
OPACITY
OPACITY60%
CROSSHAIR BEHAVIOUR
SHOW CROSSHAIR DURING TEST
HIDE AT SCREEN EDGES
CROSSHAIR OUTLINE / SHADOW
INVERT AT BRIGHT AREAS
CYCLE BEHAVIOUR
ENABLE AUTO-CYCLE
LOOP INDEFINITELY
RANDOMISE ORDER
FLASH ON TRANSITION
PAUSE ON HOVER
CYCLE SPEED
DWELL TIME3s
TRANSITION EFFECT
⚡INSTANT
🌫️FADE
▶WIPE
COLOUR ORDER

Drag to reorder. Toggle to include/exclude from cycle.

QUICK PRESETS
MARKER APPEARANCE
MARKER SHAPE
MARKER SIZE
DOT SIZE14px
MARKER OPACITY
OPACITY90%
MARKER COLOURS (BY TYPE)
🔴 DEAD PIXEL
🟠 STUCK PIXEL
⚪ HOT PIXEL
🟢 FALSE ALARM
MARKER BEHAVIOUR
SHOW MARKERS DURING TEST
PULSE ANIMATION ON MARK
SHOW COORDINATE TOOLTIP
AUTO-CLASSIFY ON COLOUR
PERSIST MARKERS BETWEEN TESTS
SNAP TO NEAREST PIXEL
MARKER LIMIT
MAX MARKERS100
EXPORT FORMAT
📄.TXT
📊.CSV
🗃️.JSON
🌐.HTML
NAVIGATION
Next Colour
→
Prev Colour
←
Quick Black
B
Quick White
W
Toggle Grid
G
Exit Test
ESC
TOOLS
Place Marker
Click
Pixel Fix Tool
F
Toggle Markers
M
Toggle HUD
H
Show Help
?
Screenshot
P
💡 Click a key binding to re-assign it. Press any key to set, ESC to cancel.
SOUND EVENTS
PLAY SOUND ON COLOUR CHANGE
PLAY SOUND ON MARKER PLACED
PLAY SOUND ON TEST START
PLAY SOUND ON TEST EXIT
PLAY SOUND ON FIX COMPLETE
MASTER VOLUME
VOLUME60%
SOUND TYPE
🔔BEEP
🖱️CLICK
🎵CHIME
🔇NONE
SOUND PREVIEW
${Array.from({length:16},(_,i)=>`
`).join('')}
PITCH
FREQUENCY880Hz
SESSION OVERVIEW
0
TESTS RUN
0
PIXELS MARKED
0
DEAD
0
STUCK
SESSION LOG
NO SESSIONS YET
SESSION OPTIONS
AUTO-SAVE SESSION ON EXIT
RESTORE MARKERS ON RELOAD
SHOW SUMMARY ON TEST END
REMEMBER LAST COLOUR
REMEMBER LAST PATTERN
SESSION HISTORY LIMIT
MAX SESSIONS STORED20
DATA MANAGEMENT
QUICK LAUNCH PRESETS

One-click configurations for common testing scenarios. Click a preset to apply its settings, then hit the fullscreen button.

📋
RMA CHECK
Quick check for warranty claims. All primaries, grid overlay, auto-cycle 4s
🔍
THOROUGH
Full 15-colour sweep, slow cycle, grid + markers on
🖤
OLED / AMOLED
Black first, burn-in test, near-black ramps, retention check
🎮
GAMING MONITOR
Flicker test, sharpness, contrast, fast cycle 1s
📷
PHOTO / COLOUR
Banding, uniformity, colour temp D65, gradients
👁️
EYESTRAIN CHECK
PWM flicker detection, colour temperature, near-white
⚡
QUICK 5-MIN
5 key colours, auto 2s cycle, no grid, primaries only
🗺️
DEFECT MAPPING
Pixel walk scan + marker mode + export-ready report
🏆
PROFESSIONAL
Full suite: all colours, all patterns, banding, ITU bars, export
CUSTOM PRESETS
Save your current settings as a named custom preset for quick recall.
PERFORMANCE
USE HARDWARE ACCELERATION
HIGH-PRECISION PIXEL COORDS
CANVAS RENDERER (PATTERNS)
VSYNC-ALIGNED TRANSITIONS
DEVICE PIXEL RATIO
DPR OVERRIDE
PIXEL WALK SETTINGS
LEAVE TRAIL DURING WALK
PAUSE ON POSSIBLE DEFECT
FLICKER TEST
USE REQUESTANIMATIONFRAME
COMPENSATE FOR DISPLAY LAG
NOTIFICATIONS
SHOW TOAST NOTIFICATIONS
NOTIFICATION ON MARKER PLACE
NOTIFICATION ON TEST END
TOAST DURATION
DISPLAY TIME2.4s
DIAGNOSTICS
DANGER ZONE
BRIGHTNESS SIMULATION

Overlay a brightness offset on the fullscreen test. Useful for checking dim or HDR displays without changing system settings.

BRIGHTNESS OFFSET0%
CONTRAST BOOST100%
SATURATION100%
GAMMA CORRECTION
GAMMA2.2
🍎1.8 MAC
🖥️2.2 STANDARD
🎬2.6 CINEMA
DISPLAY FILTER
◻NONE
🌙NIGHT
❄️COOL
🔆WARM
⬛B&W
🔄INVERT
DISPLAY TYPE PRESETS
DISPLAY ORIENTATION
▭LANDSCAPE
▯PORTRAIT
↻ROT. 90°
↺ROT. 270°
REFRESH RATE TARGET
💡 Detected refresh rate: —
Physical resolution: —
COLOUR BLIND SIMULATION

Apply colour vision deficiency filters to simulate how the test looks for people with different colour vision. Useful for designing accessible test workflows.

NORMAL
PROTANOPIA
Red-blind
DEUTERANOPIA
Green-blind
TRITANOPIA
Blue-blind
ACHROMATOPSIA
No colour
ANOMALOUS
Weak red
COLOUR BLIND INTENSITY
FILTER STRENGTH100%
MOTION & ANIMATION
REDUCE UI MOTION
DISABLE AUTO-PLAY ANIMATIONS
SLOW MOTION MODE (×0.25)
VISUAL AIDS
HIGH CONTRAST UI MODE
EXTRA LARGE CLICK TARGETS
FOCUS RING VISIBLE ALWAYS
SCREEN READER FRIENDLY LABELS
FLASH WARNING BEFORE TESTS
TEXT LEGIBILITY
UI FONT
LINE HEIGHT1.6
LETTER SPACING0px
CALIBRATION WORKFLOW
1WHITE POINT
2BLACK LEVEL
3GAMMA
4GREYSCALE
5COLOUR
6UNIFORMITY
WHITE POINT TARGET
STANDARD
CUSTOM KELVIN6500K
D65 WHITE POINT — Click to test
GAMMA CALIBRATION
50% GAMMA PATCH — Click to launch
A perfectly calibrated gamma 2.2 display shows the 1px alternating stripe as an even mid-grey (≈128,128,128). Adjust monitor gamma until stripe matches the solid grey patch.
BLACK LEVEL
BLACK FLOOR OFFSET0
ICC / COLOUR PROFILE
DETECTED COLOUR GAMUT
Loading…
UNIFORMITY CALIBRATION
Divide your screen into a measurement grid and record brightness/colour values at each zone. Use with a colorimeter for professional calibration.
GRID ZONES
ANIMATION SPEED
🐢×0.25
🐌×0.5
⚡×1
🚀×2
UI TRANSITIONS
PANEL OPEN/CLOSE ANIMATION
BUTTON HOVER EFFECTS
CARD HOVER LIFT
RAINBOW GRADIENT ANIMATIONS
BACKGROUND RADIAL PULSE
STAT CARD NUMBER COUNT-UP
NOTIFICATION SLIDE-IN
TRANSITION DURATION
HOVER DURATION200ms
EXPAND DURATION200ms
COLOUR CHANGE EFFECT
⚡INSTANT (No transition)
🌫️CROSSFADE (Smooth fade)
▶WIPE LEFT→RIGHT
▼WIPE TOP→BOTTOM
⚡FLASH (Brief white)
⭕RADIAL EXPAND
LIVE ANIMATION DEMO
EASING CURVE
EASING FUNCTION
PARTICLE EFFECTS
MARKER PLACE PARTICLE BURST
CYCLE RIPPLE EFFECT
DEFAULT FLICKER SETTINGS

These values are used as defaults when you open the Flicker / PWM test section above.

DEFAULT FREQUENCY
DEFAULT DUTY CYCLE
DUTY CYCLE50%
DEFAULT TEST COLOUR
WAVEFORM TYPE
⬛SQUARE (PWM)
〜SINE (Dimmer)
△TRIANGLE
⊿SAWTOOTH
WAVEFORM VISUALISER
SENSITIVITY SETTINGS
PREVIEW SENSITIVITY50%
RAMP-UP TIME0ms
SAFETY OPTIONS
SHOW PHOTOSENSITIVITY WARNING
AUTO-STOP AFTER 30 SECONDS
LIMIT MAX FREQUENCY TO 120Hz
FADE IN INSTEAD OF INSTANT
⚠️ Flicker tests can trigger photosensitive epilepsy. Always enable the safety warning for shared displays.
PIXEL WALK DEFAULTS

Default settings applied when the Pixel Walk test is launched.

DEFAULT SCAN MODE
→HORIZONTAL SCAN (Default)
↓VERTICAL SCAN
⟋DIAGONAL SCAN
🌀SPIRAL INWARD
🎲RANDOM WALK
DEFAULT WALK SPEED
DEFAULT DOT COLOUR
DEFAULT DOT SIZE
DOT SIZE2px
WALK BEHAVIOUR
AUTO-START ON SECTION OPEN
LOOP SCAN WHEN COMPLETE
LEAVE FADING TRAIL
SHOW SCAN PROGRESS BAR
SHOW COORDINATE OVERLAY
HIGHLIGHT EDGES ON START
SHOW COMPLETION NOTIFICATION
BACKGROUND COLOUR
MINI PREVIEW
EXPORT FORMAT
📄TXT
Plain text
📊CSV
Spreadsheet
🗃️JSON
Machine-readable
🌐HTML
Web report
📝MARKDOWN
GitHub/Docs
🔖XML
Structured
📋TSV
Tab-separated
🗒️PDF PRINT
Print report
REPORT CONTENT
INCLUDE SCREEN SPECIFICATIONS
INCLUDE SESSION TIMESTAMP
INCLUDE PIXEL COORDINATES
INCLUDE COLOUR AT MARKER
INCLUDE PIXEL TYPE / CLASS
INCLUDE DEVICE PIXEL RATIO
INCLUDE FLICKER TEST RESULTS
INCLUDE CALIBRATION RESULTS
REPORT TEMPLATE
📋STANDARD REPORT
📃MINIMAL (coords only)
📦RMA WARRANTY CLAIM
🏢PROFESSIONAL FULL
FILE NAMING
FILENAME PATTERN
AUTO-EXPORT
AUTO-EXPORT ON TEST END
AUTO-EXPORT ONLY IF DEFECTS
REPORT PREVIEW
No markers yet. Run a test and mark pixels to preview the export.
DEADPIXEL
ADVANCED SCREEN DIAGNOSTIC TOOL
v3.0.0 26 SETTINGS TABS 15 COLOURS 12 PATTERNS 7 SCAN MODES LOCAL ONLY
FEATURE SUMMARY
✓ Fullscreen solid colours
✓ 12 test patterns
✓ Pixel click marker
✓ Pixel fix tool
✓ PWM flicker test
✓ Gradient banding
✓ Sharpness patterns
✓ Contrast/PLUGE tests
✓ OLED burn-in test
✓ Colour temperature
✓ Pixel walk scan
✓ Uniformity zones
✓ Screen diagnostics
✓ Colourblind modes
✓ Gamma calibration
✓ Multi-format export
CHANGELOG
v4.0.026-tab settings: Pattern Config, Ruler Overlay, Sequence Builder, Input Settings, Notifications, Mobile, Locale/Units, Quick Start Wizard
v3.0.018-tab settings, display filters, colourblind simulation, calibration workflow, animation controls, flicker/walk config, advanced export
v2.0.0+15 colours, +12 patterns, flicker test, banding, sharpness, contrast, burn-in, colour temperature, pixel walk
v1.0.0Initial release — 9 colours, 8 patterns, pixel marker, fix tool, screen diagnostics, uniformity zones
KEYBOARD REFERENCE
→ / SpaceNext colour
←Previous colour
GToggle grid overlay
FOpen pixel fix tool
MToggle marker visibility
H / ?Keyboard help overlay
PScreenshot
BQuick jump to black
WQuick jump to white
ESCExit fullscreen test
ClickPlace defect marker
Right-clickClassify marker
PRIVACY & DATA
🔒 100% local processing. No data is ever sent to any server. All test results, session history, and settings are stored only in your browser's localStorage.
GRID & CROSSHATCH
GRID OVERLAY
CELL SIZE40px
LINE OPACITY18%
LINE THICKNESS1px
GRID STYLE
⊞SQUARE
⁙DOTS
✛CROSS
CHECKERBOARD
CHECKERBOARD
BLOCK SIZE40px
CHECKER CONTRAST
◐B&W
◑SUBTLE
◕MEDIUM
🎨CUSTOM
SCANLINES
SCANLINES
LINE SPACING4px
LINE THICKNESS1px
DIRECTION
━HORIZONTAL
┃VERTICAL
SUBPIXEL PATTERN
SUBPIXEL
STRIPE WIDTH1px
SUBPIXEL ORDER
🔴🟢🔵RGB
🔵🟢🔴BGR
DOTS PATTERN
DOTS MATRIX
DOT SPACING8px
DOT SIZE1px
DOT SHAPE
●CIRCLE
■SQUARE
✦STAR
RADIAL GRADIENT
RADIAL
CENTER POSITION
RADIUS50%
VIGNETTE
VIGNETTE
START RADIUS40%
DARKNESS75%
PIXEL RULER OVERLAY

Display a measurement ruler along the edges of the screen during fullscreen tests to precisely locate and record defect positions.

0      100      200      300px
X: 354px
SHOW RULER DURING TEST
CROSSHAIR GUIDE LINES
COORDINATE READOUT POPUP
SHOW PHYSICAL SIZE (mm)
RULER ON BOTH AXES
RULER UNIT
📏PIXELS
📐mm
📏INCH
RULER POSITION
⊤TOP
⊥BOTTOM
RULER APPEARANCE
RULER HEIGHT24px
RULER OPACITY85%
RULER COLOUR
MEASUREMENT TOOL
📐 Distance Measurement: Shift+Click to place first point, Shift+Click again to measure distance. Useful for measuring spacing between defects.
MEASURE BETWEEN MARKERS
SHOW DISTANCE IN HUD
SCREEN PHYSICAL SIZE CALCULATOR
Enter your monitor's diagonal size to calculate pixels-per-inch (PPI) and display physical dimensions.
SCREEN DIAGONAL27"
PPI: —  |  Physical: —
TEST SEQUENCE BUILDER

Build a custom ordered sequence of colour+pattern steps that auto-plays during testing. Drag to reorder, click ✕ to remove.

QUEUE (ORDERED STEPS)
QUEUE EMPTY — Add steps from the colour palette below
ADD COLOURS TO SEQUENCE
ADD PATTERNS
SEQUENCE PLAYBACK
LOOP SEQUENCE CONTINUOUSLY
AUTO-PLAY ON FULLSCREEN LAUNCH
SKIP TO NEXT ON MARKER PLACE
STEP DURATION3s
SAVED SEQUENCES
NO SAVED SEQUENCES
BUILT-IN SEQUENCES
MOUSE BEHAVIOUR
LEFT CLICK = PLACE MARKER
RIGHT CLICK = CLASSIFY MENU
MIDDLE CLICK = CYCLE COLOUR
SCROLL WHEEL = CYCLE COLOUR
DOUBLE-CLICK = REMOVE MARKER
HOLD SHIFT+CLICK = MEASURE
CLICK AREA PRECISION
MARKER SNAP RADIUS4px
CLASSIFY MENU DETECT RADIUS80px
CURSOR STYLE IN TEST
CROSSHAIR SIZE
SIZE20px
CROSSHAIR COLOUR
TOUCH / STYLUS INPUT
ENABLE TOUCH MARKERS
TWO-FINGER SWIPE = NEXT COLOUR
PINCH TO ZOOM (MAGNIFIER)
LONG PRESS = CLASSIFY MENU
THREE-FINGER TAP = EXIT
HAPTIC FEEDBACK ON MARK
LONG PRESS DURATION
THRESHOLD500ms
KEYBOARD SHORTCUTS
ENABLE KEYBOARD SHORTCUTS
SHOW SHORTCUT HINTS IN HUD
ALLOW QUICK COLOUR JUMP (B/W/R/G)
SCROLL WHEEL ACTION
🎨CYCLE COLOUR
🔲CYCLE PATTERN
🔍ZOOM
—NONE
TOAST POSITION
PIXEL MARKED · 1024, 768
NOTIFICATION DURATION
DISPLAY TIME2.4s
NOTIFICATION STYLE
■ACCENT
■GREEN
■RED
■NEUTRAL
WHICH EVENTS SHOW NOTIFICATIONS
🎨 COLOUR CHANGE
On each auto-cycle step
📍 MARKER PLACED
When pixel is marked
🏁 TEST START
On fullscreen launch
🚪 TEST EXIT
On fullscreen exit
⚡ FIX DONE
Pixel fix complete
🔄 SEQ STEP
Sequence step change
💾 EXPORT
Report exported
🔲 PATTERN CHANGE
Pattern toggle
NOTIFICATION CONTENT
SHOW ICON IN NOTIFICATION
SHOW TIMESTAMP
SHOW PIXEL COORDINATES
PAUSE ON NOTIFICATION HOVER
DESKTOP PUSH NOTIFICATION
BATCH NOTIFICATIONS (GROUP)
TOUCH GESTURES
SWIPE ACTIONS
SWIPE RIGHT
SWIPE LEFT
SWIPE UP
SWIPE DOWN
TAP ACTIONS
SINGLE TAP = PLACE MARKER
DOUBLE TAP = NEXT COLOUR
TRIPLE TAP = EXIT TEST
SWIPE THRESHOLD30px
DISPLAY & ORIENTATION
ORIENTATION
LOCK ORIENTATION DURING TEST
PREFERRED ORIENTATION
▭LANDSCAPE
▯PORTRAIT
NOTCH & SAFE AREAS
COMPENSATE FOR NOTCH/CUTOUT
TEST IN SAFE ZONE ONLY
SHOW SAFE ZONE OVERLAY
MOBILE PERFORMANCE
LOW POWER MODE
REDUCE ANIMATIONS ON MOBILE
WAKE LOCK DURING TEST
HIDE STATUS BAR (PWA)
TOUCH SENSITIVITY
TOUCH HIT AREA EXPANSION4px
INTERFACE LANGUAGE

Select your preferred display language. (More translations coming soon.)

🇬🇧English
🇩🇪Deutsch
🇫🇷Français
🇪🇸Español
🇯🇵日本語
🇨🇳中文
🇰🇷한국어
🇧🇷Português
🇷🇺Русский
🇸🇦العربية
🌐 Preview languages show UI in English with translated labels where available. Full translations are being added progressively.
DATE & TIME FORMAT
DATE FORMAT
TIME FORMAT
TIMEZONE DISPLAY
MEASUREMENT UNITS
MEASUREMENTUNIT
Pixel Coordinates px mm in
Screen Size px mm in cm
Ruler Marks px mm in
Export Coords px mm in
NUMBER FORMAT
DECIMAL SEPARATOR
THOUSANDS SEPARATOR
COLOUR FORMAT
COLOUR VALUE DISPLAY
SHOW HEX IN HUD COLOUR NAME
SHOW RGB VALUES IN MARKER LOG
SETUP WIZARD

Follow these steps for an accurate, professional dead pixel test. Check each item as you complete it.

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1
ENVIRONMENT SETUP
Prepare your testing environment for the most accurate results.
Dim or turn off room lights
Sit at normal viewing distance (50–80cm)
Allow display to warm up for 5+ minutes
Disable screen savers and power saving
2
CONFIGURE TEST
Choose your test settings and launch method.
Select starting colour (Black for stuck/hot pixels)
Enable auto-cycle (recommended: 3s intervals)
Press START FULLSCREEN TEST
Wait for display to fully switch colour
3
SCAN THE SCREEN
Systematically inspect the entire panel for anomalies.
Scan from top-left to bottom-right slowly
Check all 4 corners and edges
Test all 15 solid colours
Test near-black (#0d0d0d) for stuck/hot pixels
Click to mark any defects found
4
CLASSIFY DEFECTS
Properly identify each defect type for your report.
Right-click each marker to classify it
Dead = black on every colour
Stuck = one colour on all backgrounds
Verify each anomaly on 2+ colours
5
ATTEMPT REPAIR
For stuck pixels, try the pixel fix tool before giving up.
Open Pixel Fix Tool (⚡ FIX button or F key)
Run 30s fix cycle over stuck pixel location
Re-test after fix attempt
Repeat up to 3× if partially successful
6
EXPORT REPORT
Save your results for warranty claims or personal records.
Open Defect Tracker panel
Review all marked pixel entries
Click EXPORT REPORT (.txt / .csv)
Save report for warranty documentation
QUICK LAUNCH
📖 HOW TO TEST & WHAT TO LOOK FOR GUIDE ▸
📖
TESTING GUIDE & PIXEL TYPES
How to perform an accurate dead pixel test

🔴 DEAD PIXELS

A dead pixel is always black regardless of the colour being displayed. Test on white and bright colours — a black dot that never changes is a dead pixel. Dead pixels cannot be repaired.

🟠 STUCK PIXELS

A stuck pixel is permanently lit in one colour — usually red, green, or blue. Test on black — a coloured dot that doesn't disappear is stuck. Use the Pixel Fix tool to attempt repair.

⚪ HOT PIXELS

A hot pixel appears white or very bright. Most visible on black screens. Hot pixels sometimes fade after extended use, or respond to the pixel cycling fix tool.

🌑 BACKLIGHT BLEED

In a dark room, display pure black. Bright patches around the edges or corners indicate backlight bleed — light leaking through the LCD layer. Common on IPS panels.

🎨 UNIFORMITY ISSUES

Display a flat mid-grey colour and look for zones that appear brighter, darker, or tinted differently. Uneven uniformity is caused by inconsistent backlighting across the panel.

📐 HOW TO TEST

Launch fullscreen, dim room lights, and sit at normal viewing distance. Slowly scan the entire screen on each colour. Use the marker to flag any anomalies, then classify and export.

⚡ PIXEL FIX

The fix tool rapidly cycles RGB colours at high speed. Run it for 30–60 seconds directly on the stuck pixel. Success rate is ~30–60% on genuinely stuck pixels. Never works on dead pixels.

💡 PRO TIPS

Test in a dark room. Use all 9 solid colours — some defects only show on specific colours. Sub-pixel defects are easier to spot on white. Always check grey last for uniformity banding.