You just unpacked a display
Run the short checkup while the seller return window is still open.
Run the quick checkupCheck the screen in front of you
Screen tests with no install
Use fullscreen patterns and browser timing to inspect pixels, motion, text, color, and panel behavior. No account is required, and saved test and quick-check history uses browser storage on this device.
Popular checks
Jump to the symptom
Each page gives you a repeatable pattern or comparison. It does not turn the browser into lab equipment.
HDR Test
Check browser HDR signals and inspect HDR-oriented highlight patterns.
Open testInput Lag Test
Compare browser reaction timing across repeated pointer or keyboard trials.
Open testGradient Banding Test
Look for visible steps or posterization in smooth gradients.
Open testResponse Time Test
Look for ghosting, overshoot, and motion blur in moving patterns.
Open testBurn-in Test
Inspect solid colors and patterns for retention-like artifacts.
Open testBacklight Bleed Test
Observe edge light and corner glow on a dark fullscreen pattern.
Open testAll 20 screen tests
Pick what you can actually see: a fixed pixel, uneven light, motion trails, unclear text, or a setup mismatch.
HDR and color behavior
HDR Test
Check browser HDR signals and inspect HDR-oriented highlight patterns.
Gradient Banding Test
Look for visible steps or posterization in smooth gradients.
Gamma Test
Compare browser gamma patterns before changing display settings.
Contrast Ratio Test
Inspect shadow detail, highlight detail, and visible clipping.
Color Temperature Test
Compare warm, neutral, and cool browser-rendered white references.
Pixels, uniformity, and panel defects
Dead Pixel Test
Use solid colors to locate pixels that remain dark, bright, or fixed.
Touch Screen Test
Trace the display to reveal areas where pointer input repeatedly drops out.
Uniformity Test
Compare visible brightness and color consistency across the panel.
Burn-in Test
Inspect solid colors and patterns for retention-like artifacts.
Backlight Bleed Test
Observe edge light and corner glow on a dark fullscreen pattern.
Viewing Angle Test
Observe color and contrast changes from off-center positions.
Motion, frame timing, and interaction
Response Time Test
Look for ghosting, overshoot, and motion blur in moving patterns.
Refresh Rate Test
Record browser frame cadence and compare it with the configured refresh rate.
Frame Skipping Test
Photograph a numbered sequence and check whether the same gap repeats.
Input Lag Test
Compare browser reaction timing across repeated pointer or keyboard trials.
Flicker Test
Use a phone camera to compare visible bands or pulsing.
Text and viewing comfort
Screen information and multi-display setup
Not sure where to begin?
Start with the job you need to finish, not a technical term.
One symptom is bothering you
Choose the closest test, reproduce the issue, and change one setting at a time.
See common symptomsYou need a record for support
Organize repeatable observations, settings, and photos into a report you control.
Build a defect reportMethod and privacy
Read the result at the right level
A test can show a repeatable visual pattern, a browser-reported capability, or browser frame timing. Use it to describe what changes by color, mode, input, or viewing position.
It cannot isolate every part of the signal chain or measure luminance, color accuracy, panel response, or display-only input lag. Those jobs need suitable instruments and a controlled method.
Saved test and quick-check history uses browser storage on this device. Report-builder inputs and selected photos stay only in the current page session and disappear on reload unless you export a report.
Practical guides