All Display Test Tools
50+ free, browser-based tools to test every aspect of your LCD, OLED, AMOLED, Mini-LED, or HDR display. Check dead pixels, ghosting, refresh rate, color gamut, gamma, brightness, touch accuracy, text clarity, and OLED image retention without downloads or registration.
Find defects before returning a screen
Use solid colors and black-field tests to catch dead pixels, stuck pixels, dust, clouding, IPS glow, and backlight bleed while warranty options are still open.
Improve gaming motion and latency
Confirm refresh rate, check frame pacing, compare response-time transitions, and tune overdrive settings for less ghosting and overshoot.
Set up accurate color and brightness
Validate sRGB and DCI-P3 coverage visually, adjust gamma, compare white balance, and look for banding in smooth gradients.
Reduce OLED burn-in risk
Check image retention, use full black tests, run moving screensavers, and avoid leaving bright static UI elements active for long sessions.
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.
Screen Uniformity
Grey patterns to detect dirty screen effect and banding.
Touch Screen Test
Test touch accuracy, dead zones, and multi-touch support.
Blooming Test
See how far light haloes around bright objects on black.
Dead Pixel Warranty Check
Is your defect count above the ISO 13406-2 allowance?
Color & Calibration
Color Test
Display any custom color fullscreen.
Gradient Test
Reveal color banding with smooth gradients.
Contrast Test
Test contrast ratio with near-black and near-white patterns.
Gamma Calibration
Calibrate display gamma to the 2.2 standard.
Color Picker
Pick and preview any color in fullscreen mode.
Color Accuracy
Reference color blocks for sRGB and DCI-P3.
RGB Color Mixer
Mix any RGB color with live sliders.
Color Blindness Test
Ishihara-style color perception patterns.
HDR Monitor Test
Check HDR support, peak brightness, and color gamut.
Brightness Test
Grey ramp, PLUGE near-black, and ANSI contrast patterns.
Sub-Pixel Test
1px patterns to analyze sub-pixel layout and ClearType rendering.
Color Temperature Test
Preview monitor white balance from 2000K to 10000K.
Chroma Subsampling
Check whether you are getting full 4:4:4 color or a subsampled signal.
Motion & Performance
Motion Blur Test
Evaluate ghosting and motion clarity.
Ghosting Test
Moving patterns to reveal overshoot and ghosting.
Response Time
Black-to-white transition evaluation.
Refresh Rate Test
Measure actual refresh rate in real time.
PWM Flicker Test
Detect backlight PWM flicker patterns.
Input Lag Test
Measure click-to-flash latency to evaluate monitor input lag.
Frame Skip Test
Detect dropped frames and judder using requestAnimationFrame.
Screen Tearing Test
Fast moving edge to check VSync and adaptive sync.
Pixel Inversion Test
Fine patterns that expose LCD voltage inversion artifacts.
VRR Flicker Test
Check whether G-Sync or FreeSync pulses your screen brightness.
FPS Blind Test
Guess which of two clips is smoother and see if you can tell high refresh rates apart.
Display Information
Screen Info
Resolution, pixel ratio, color depth and more.
Text Clarity
Test sub-pixel rendering and text sharpness.
Viewing Angle
IPS glow and contrast at off-axis angles.
Aspect Ratio
Detect and visualize your aspect ratio.
Pixel Density
Calculate PPI and dot pitch for any resolution.
Screen Timer
Break reminder with the 20-20-20 rule.
Screen Ruler
Calibrated on-screen ruler in cm and inches.
Bandwidth Calculator
Which HDMI or DisplayPort version carries your mode.
Peripheral Diagnostics
Keyboard Test
Test every key, detect ghosting, and verify N-key rollover.
Mouse Test
Test all mouse buttons, scroll wheel, and side buttons.
Speaker Test
Check left and right audio channels, bass, and frequency range.
Webcam Test
Check camera resolution, FPS, and image quality live.
Microphone Test
Check mic input level, record a clip, and play it back.
Games & Fun
Reaction Time
Test your reaction speed in milliseconds.
Click Speed Test
Measure your clicks per second.
Aim Trainer
Click on targets as fast as you can.
Screensaver
Bouncing ScreenLab logo, DVD style.
Crosshair Overlay
Customizable gaming crosshair overlay with fullscreen mode.