Android phone
Compare color, pixel uniformity and the touch points your browser reports.
Display diagnostics in your browser
Screen Test Tools for Practical Display Checks
Check resolution, color, pixels, HDR, OLED motion, touch and refresh behavior. Each test runs in your browser and explains what it can—and cannot—measure.
Works on phone, tablet, laptop, monitor, ultrawide and TV
Choose a screen test
Open one focused tool and follow the instructions on that page.
Start here
Motion
FPS Comparison Test
Compare eight distance-driven gallop targets from 15 to 600 FPS.
Open testRefresh Rate Test (Hz Test)
Estimate browser frame cadence and compare it with your selected display mode.
Open testMonitor Ghosting Test
Compare moving edges and trails at adjustable speeds.
Open testOLED Test
Check persistent marks, motion patterns and OLED-related visual behavior.
Open testColor & pixels
Black Screen
Open a pure black field with optional timer and hidden cursor.
Open testWhite Screen
Inspect marks and pixels with white and other solid-color fields.
Open testBurn-In Test
Cycle fullscreen color fields to inspect persistent images and possible OLED burn-in.
Open testDead Pixel Test
Inspect solid colors, gradients and possible dead or stuck pixels.
Open testScreen Uniformity Test
Compare gray and white fields for tint, patches and vertical bands.
Open testBlack Level Test
Inspect near-black and near-white coded steps for clipping.
Open testHDR Support
Inspect shadow and highlight patches and browser-reported HDR-related signals.
Open testPanel
Backlight Bleed Test
Inspect dark fields for edge glow and uneven light.
Open testViewing Angle
Check how color and contrast change when you move off-axis.
Open testTools
What Is My Screen Resolution?
Inspect screen size, viewport and device pixel ratio reported by your browser.
Open testPPI & Screen Size Calculator
Calculate pixel density, pixel pitch, aspect ratio and viewing geometry.
Open testTouch Screen Test
Explore simultaneous touch points, reaction timing and aim practice.
Open testVideo Player
Compare aspect-ratio framing with a built-in 4K video stream.
Open testLast updated:
What ScreenMotion Lab is for
ScreenMotion Lab helps you investigate common display questions without installing desktop software. Use solid colors to look for pixel faults, gradients to inspect tonal transitions, motion patterns to compare frame behavior, and calculators to understand pixel density and viewing distance.
The tests are grouped by purpose. Pixel and color tools focus on panel uniformity and visible defects. HDR and OLED tools focus on blacks, highlights, gradients and motion. Refresh-rate and FPS tools focus on browser frame cadence and visual smoothness. Touch tools combine interaction timing with on-screen targets.
These are practical checks, not laboratory certification. Browser results can be affected by the operating system, graphics driver, cable, power mode, browser compositor and display settings. Every test includes limitations and steps for confirming a result.
Test any screen
iPhone
Inspect solid colors and touch response in your mobile browser.
iPad and tablets
Check the larger touch surface for missed touches, uneven color and visible pixels.
Mac
Compare browser frame cadence, moving edges and near-black detail.
Windows laptop and monitor
Inspect dark-field edges, pixel faults and the current browser update cadence.
Ultrawide
Compare edge-to-edge uniformity, viewing-angle shifts and motion across a wide panel.
TV
Use a compatible TV browser to inspect dark fields, near-black steps and uniformity.
Learn before you decide
Screen testing guides
Understand what a result may mean, how to confirm it and where the limits are.
How to check if your monitor is running at 144Hz
Check your active display mode and troubleshoot a missing 144Hz option.
Read guide60Hz vs 144Hz vs 240Hz: is the difference worth it?
Compare refresh intervals, motion clarity and the demands on your computer.
Read guideHow to find and fix dead or stuck pixels
Identify dark or stuck pixels and learn safe next steps without repair promises.
Read guideWhat is backlight bleed and is it normal?
Separate light leakage from IPS glow and judge dark scenes under useful conditions.
Read guideMonitor ghosting explained: causes and fixes
Recognize pixel trails and overdrive halos, then compare settings consistently.
Read guideOLED burn-in: how to test and prevent it
Inspect retention patterns and learn sensible OLED protection and maintenance habits.
Read guideHDR and OLED Screen Testing Guide
Understand HDR signals, OLED patterns and the limits of browser-based display checks.
Read guide