Test your screen.
Trust your display.
Professional-grade display diagnostics right in your browser. Detect dead pixels, calibrate colors, measure motion blur, test your touch screen, and protect your OLED. Completely free.
Dead Pixel Test
Cycle through solid colors to detect dead, stuck, or hot pixels on your display.
OLED Burn-in Check
Specialized patterns to detect sub-pixel degradation and image retention on OLED panels.
Touch Screen Test
Draw on your screen to find dead zones, test multi-touch support, and check pressure sensitivity.
Start by problem
A proper display check is a workflow, not one pattern.
ScreenLab groups browser-based tests around the jobs people actually need: validating a new panel, tuning games, checking color, and protecting OLED hardware. Each path links directly to the tools and guides that belong together.
Bought a new monitor
Check for dead pixels, stuck sub-pixels, backlight bleed, uniformity problems, and touchscreen dead zones before your return window closes.
Tune a gaming setup
Measure refresh rate, spot frame skipping, compare response-time transitions, and tune overdrive without installing desktop software.
Calibrate color and clarity
Use practical browser patterns for color gamut, gamma, white balance, gradients, text sharpness, and sub-pixel rendering checks.
Protect an OLED display
Look for image retention, test pure black uniformity, run maintenance patterns, and reduce static-image burn-in risk.
Every test your display needs
From basic dead pixel detection to OLED burn-in analysis and fun reaction time games. Pick a category or browse all 50+ tools.
Pixel & Defect Detection
Dead Pixel Test
Fullscreen color cycling to find dead or stuck pixels.
Stuck Pixel Fixer
Rapid color flashing to reactivate stuck sub-pixels.
Backlight Bleed Test
Pure black screen to reveal light leaks and clouding.
Touch Screen Test
Test touch accuracy, dead zones, and multi-touch.
Color & Calibration
Color Test
Display any custom color fullscreen for visual inspection.
Gradient Test
Reveal color banding with smooth channel gradients.
RGB Color Mixer
Mix and preview any RGB color with live sliders.
Color Blindness Test
Check your color perception with Ishihara-style patterns.
Motion & Performance
Motion Blur Test
Moving objects to evaluate ghosting and motion response.
Refresh Rate Test
Measure your actual display refresh rate in real-time.
Reaction Time
Test your reaction speed. Click as fast as you can.
Click Speed Test
How many clicks per second can you manage?
OLED Care & Maintenance
Precision Visual Tests
Color Gamut Test
Compare sRGB and P3 color patches to evaluate your display gamut.
White Balance Test
Check for color casts in whites and grays.
Sharpness Test
Fine line patterns and text to evaluate monitor sharpness.
Checkerboard Test
Alternating pixel grid to test resolution accuracy.
Crosshair Overlay
Custom gaming crosshair with adjustable style, size and color.
How it works
Pick a test
Choose from 50+ specialized diagnostic tools designed for LCD, OLED, and HDR displays.
Go fullscreen
Launch the test in fullscreen mode. No distractions, just your display and the test pattern.
Evaluate results
Follow the on-screen guide to interpret what you see. Know exactly what is normal and what is not.
From the blog
Guides, tutorials, and deep dives into display technology.
Free & browser-based
Ready to test your display?
Every tool runs entirely in your browser - no installs, no accounts, no catch. Works on phones, laptops, and ultra-wide monitors alike.