DISPLAY TEST

Test your monitor.

Check pixels, refresh, ghosting and gamma. No setup required.

NO INSTALLLIVE FEEDBACKLOCAL ONLY

STARTPick a screen check

WATCHUse colors or motion refs

ACCESSFullscreen on request

DATALocal only

1Pick a screen check

2Use colors or motion refs

3Exit with Esc

MONITOR TEST

Pick a screen check.

No setup. Start with pixels, refresh, or visual references.

START HERE

Choose one.

Setup tips are optional.

01Dead pixels

Full-screen solid colors.

02Refresh rate

8-second frame sample.

03Ghosting / gamma

Visual references below.

Visual tools

OPTIONAL TIPS0/4 optional tips

Optional.

Warm monitorClean dustStable lightZoom 100%

SCREEN CSS—

AVAILABLE—

VIEWPORT—

PIXEL RATIO—

COLOR DEPTH—

COLOR GAMUT—

DYNAMIC RANGE—

P3 / PQ CSS—

ORIENTATION—

EST. REFRESHNOT MEASURED

MOTION REFERENCERUNNING

CONFIDENCE NOT MEASUREDMEDIAN —P95 JITTER —INTERVALS 0LONG FRAMES —SEVERE STUTTERS —EST. MISSED —DELIVERY —

TEMPORAL STIMULUS

PURSUIT CAMERA TARGET

Track the target with your eyes or a pursuit camera. Blur width is human-inspected evidence, not a browser-measured GtG value.

010203040506070809101112131415161718192021222324

FRAME-SKIP REFERENCE / Photograph this strip with a suitable shutter speed. Missing or doubled positions can indicate uneven browser delivery; this is not a panel timing certificate.

Look for tearing, uneven motion or heavy trailing. This visual reference does not measure panel response time.

VISUAL GAMMA MATCH

Step back until the one-pixel dither blends. Choose the target whose left and right halves appear closest. This estimates visual transfer behavior; it does not calibrate the panel.

RESULT / NOT RECORDEDVisual reference only. No ICC profile is written and no panel calibration or Delta E claim is made.

HDR / WIDE COLOR PATHUNKNOWN RANGE / UNKNOWN GAMUT

SRGB REFERENCE

DISPLAY-P3 CSS / NO

REC.2100 PQ CSS / NO

These fields test browser color syntax and media queries. They do not prove panel gamut volume, tone mapping, peak brightness or HDR accuracy.

HUMAN OBSERVATION INPUTFeeds the action engine; does not certify the panel.

Missing or doubled pursuit positionsHeavy or inverse trailingEye-visible flicker or brightness pumping

DIAGNOSTIC ACTION ENGINECOMPLETE THE PROTOCOL

Optional setup tips are unchecked

Warm-up, dust, lighting and zoom tips are optional.

2 FINDING(S)3 ACTION(S)RULES / EVIDENCE-BOUND

INFO

Optional setup tips are unchecked

Warm-up, dust, lighting and zoom tips are optional.

LIKELY CAUSES

The pixel, refresh and visual checks can run now.

ACTIONS

Use them only when you need repeatable before/after evidence.
For a quick check, start Pixel test or Measure refresh directly.

RETEST CONDITION

Change one display setting at a time when comparing runs.

INFO

Run the eight-second frame pacing capture

No fixed-window animation-frame result is available.

LIKELY CAUSES

The timing protocol has not completed in this page session.

ACTIONS

Keep the tab visible and run Measure refresh rate (8 sec).

RETEST CONDITION

Accept the result only when at least 180 intervals were captured.

Actions are generated from visible Evidence fields and versioned product rules. They do not identify a physical root cause with laboratory certainty.

LOCAL BASELINE HISTORY / OPT-IN

Compare repeat tests without an account.

0 / 20 SAVED · 90 DAY RETENTION

Device report

Complete this protocol before saving a baseline.

DISPLAY TIMING REPEATABILITY / LAST 5NEEDS MORE RUNS

0/5 RECENT COMPATIBLE RUNS

Save 3 more compatible run(s).

Delivered refresh— HzNEEDS 3 VALUESSTABLE ≤3% · REVIEW ≤8%NEEDS MORE RUNS

Refresh stability— %NEEDS 3 VALUESSTABLE ≤5 pp · REVIEW ≤12 ppNEEDS MORE RUNS

Frame delivery— %NEEDS 3 VALUESSTABLE ≤4 pp · REVIEW ≤10 ppNEEDS MORE RUNS

0 incompatible/incomplete and 0 older compatible run(s) excluded. requestAnimationFrame measures browser delivery, not panel scanout or pixel response.

No raw axes, key logs, audio, video, images, full user agent or device ID is stored. Clearing browser site data also removes this history.

API Screen API + requestAnimationFrame + Fullscreen APIPROCESSING BROWSER LOCALSCHEMA inputproof-evidence-v1RAW UPLOAD 0 B

OPTIONAL TIPSImprove repeat checks0/3 checked

Optional. The test works without this; these tips only reduce comparison noise.

MEASUREMENT BOUNDARY

Useful evidence, without pretending to be a laboratory.

Refresh is browser-estimated.

Browser dimensions are not panel hardware specs.

Pixel and motion checks need your eyes.