Compare · Observe · Record

Find what changes on your screen

Start with a symptom, compare one change, and keep a record you can explain. Use the patterns below, then bring your observations, settings, and photos together in a private support report.

Check a New Display Browse All Tests

No install or account. Saved observations stay in this browser; you choose what to export.

Not sure where to begin?

Start with the job you need to finish, not a technical term.

You just unpacked a display

Inspect pixels, uneven shading, and retained shapes. Confirm each observation yourself; a timer cannot pass the screen.

Run the quick checkup

You are not sure what the mark means

Try the illustrated comparison: does a mark move with the content, or stay at one screen position?

Learn to separate the two

You need a record for support

Organize repeatable observations, settings, and photos into a report you control.

Build a defect report

Common display problems

What are you seeing?

Choose a comparison that can change your next step. You do not need to complete every test.

A dot stays in one place

Change solid colors, then move the content. Record the location and backgrounds that reveal the point.

Compare colors and position

A corner glows in dark scenes

Compare the centered view with a small change in head position at the same brightness. Check ordinary content too.

Compare position and lighting

Letters are soft or have colored edges

Keep one text reference fixed while changing app, zoom, or scale. Find which change actually follows the blur.

Compare the same text

Moving objects leave a trail

Keep pattern speed and refresh rate fixed while comparing overdrive settings. Record a dark trail, bright halo, or blur.

Compare motion settings

An old shape remains visible

Look on plain backgrounds and then normal content. Record where the shape persists without calling it permanent.

Compare plain backgrounds

A smooth shade breaks into bands

Compare a 256-value reference with deliberately stepped source images. Download the same PNG to check another viewer.

Separate source steps from screen behavior

All 20 screen checks and references

For a specific setup question, choose a tool below. The inspection guide explains how to compare and interpret a finding.

HDR and color behavior

HDR Capability Check

Check browser HDR capability, verify your setup, and optionally compare SDR patterns.

Gradient Banding Test

Compare known gray values and download the same source image for another viewer.

Gamma Test

Compare browser gamma patterns before changing display settings.

Black and White Detail Check

Inspect shadow detail, highlight detail, and visible clipping.

Color Temperature Test

Keep the same white reference while comparing one display setting and returning to baseline.

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 short numbered trail and compare repeated internal gaps without wrapping the sequence.

Browser Reaction Time Check

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

Text Clarity Test

Compare font readability, fringing, and stroke appearance.

Viewing Distance Calculator

Compare desk distance and viewing angle with a transparent screen-geometry calculation.

Screen information and multi-display setup

Screen Info

Read browser-visible resolution, pixel ratio, and display capability signals.

Multi-Screen Alignment

Compare visible alignment and relative color across displays.

Method 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.

Try the known-source gradient comparison, follow the dark-scene comparison sequence, or calculate how much of your view the screen occupies. Each shows its assumptions and explains what a different result would mean.

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

Turn an observation into a next step

Browse all guides