Test your screen.
Trust your display.
Professional-grade display diagnostics right in your browser. Detect dead pixels, calibrate colors, measure motion blur, and protect your OLED. Completely free.
Start here
What are you trying to find out?
Most display problems have a standard order of checks. Pick the situation that matches yours and follow the tools and guides that belong together.
I just bought a monitor
Check for dead pixels, backlight bleed and uniformity problems while you can still return it.
My screen looks wrong
Blurry text, flickering or washed-out color. Work through the usual causes before blaming the panel.
I want faster gaming
Verify your real refresh rate, find the overdrive setting that looks cleanest, and check for frame skipping.
I have an OLED
Look for early image retention and run the maintenance patterns that keep burn-in risk low.
Every test your display needs
From dead pixel detection to OLED burn-in analysis. Browse by category, or see all 50+ tools.
Pixel & defects
Find dead pixels, stuck sub-pixels, backlight bleed and uniformity problems before your return window closes.
Color & calibration
Check gamut coverage, gamma, white balance and color accuracy before doing anything color-critical.
Motion & performance
Measure what your monitor actually does under motion: refresh rate, response time, ghosting and input lag.
OLED care
Check for image retention and run maintenance patterns that reduce the risk of permanent burn-in.
Precision & detail
Fine patterns that expose sharpness, sub-pixel rendering and text clarity problems at native resolution.
Fullscreen color screens
Solid color fills for spotting defects, cleaning guides, and light-leak checks.
Pick a test
Choose from 50+ diagnostic tools built for LCD, OLED and HDR displays.
Go fullscreen
Run it fullscreen so nothing but the test pattern is on your panel.
Read the result
Every tool explains what you are looking at and what counts as normal.
From the blog
Guides 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.