Online Screen Tests

Free Online Screen Tests for Monitors, Laptops, Phones & Tablets

Choose the right screen test for dead pixels, stuck pixels, touch failures, broad color checks, backlight bleed, and OLED burn-in. Compare symptoms, launch the correct workflow, and move into repair, warranty, or monitoring with stronger evidence.

Choose Your Screen Test
  • Free browser-based workflows
  • No account required
  • Built for evidence-first troubleshooting

Maintained byJacob Dymond

Content updated March 28, 2026

Choose the right screen test

Match what you see to the closest row and open the linked test.

What you see

Black dot that never lights up

Likely issue
Dead pixel
Mistaken for
Dust, panel texture, pressure mark

What you see

Bright red, green, blue, or white dot

Likely issue
Stuck or hot pixel
Mistaken for
Compression artifact, glare, subpixel fringing

What you see

Bright corners or edges in dark scenes

Likely issue
Backlight bleed
Mistaken for
IPS glow, reflections, overexposed photos

What you see

Glow that changes when you shift your angle

Likely issue
IPS glow
Mistaken for
Fixed backlight bleed

What you see

Faint logo or UI shadow that fades after use

Likely issue
Temporary image retention
Mistaken for
Permanent burn-in

What you see

Logo or UI outline that stays in one place with little change

Likely issue
Likely permanent OLED burn-in
Mistaken for
Short-term retention, dirty panel, reflections

What you see

Part of the screen ignores touch or swipes break in one area

Likely issue
Touch dead zone or failing digitizer area
Mistaken for
Wet screen, bad protector, accidental palm rejection

What you see

The issue is visible, but you need the cleanest pattern first

Likely issue
Broad visual problem that needs route selection before a specialist test
Mistaken for
Wallpaper, reflections, and one-off app rendering

What you see

Motion feels capped or a 144Hz monitor reads like 60Hz

Likely issue
Refresh rate not active for this window
Mistaken for
Low game FPS, panel ghosting, or adaptive-sync branding

What each test can and cannot prove

Browser tests screen visible defects. They do not replace manufacturer review or model-specific policy decisions.

Test

Pixel Test

Confirms
Whether a point defect stays black, bright, or a fixed color across multiple solid patterns.
Retest rule
Repeat across several colors and after cleaning the panel.
Cannot prove
Model-specific warranty eligibility or whether a hardware repair will succeed.

Test

Backlight Bleed Test

Confirms
Whether bright corners or edge patches stay fixed under a dark-screen setup.
Retest rule
Repeat in a dark room and after a small viewing-angle change.
Cannot prove
Whether a manufacturer will consider the uniformity issue out of tolerance.

Test

Burn-In Test

Confirms
Whether stationary ghosting appears across diagnostic patterns and survives retesting.
Retest rule
Run again after varied content at normal brightness.
Cannot prove
Exact panel wear level or guaranteed service coverage.

Test

Touch Screen Test

Confirms
Whether the same area keeps missing touch, swipes break in one path, or the screen starts reacting unpredictably.
Retest rule
Repeat one deliberate pass instead of rapid random swiping.
Cannot prove
The exact hardware cause or whether repair is worth it by itself.

Test

Screen Color Test

Confirms
Which pattern reveals the issue most clearly before you open a narrower workflow.
Retest rule
Recheck the same issue on white, black, gray, and RGB as needed.
Cannot prove
The final diagnosis if the issue belongs in Pixel, Bleed, Burn-In, or damage diagnosis.

Test

Refresh Rate Test

Confirms
The browser-effective refresh rate and pacing for the current window.
Retest rule
Retest after OS, cable, power, or Safari changes with the tab focused.
Cannot prove
Panel datasheet max, FreeSync/G-Sync brand status, or pixel response time.

What to do after testing

Capture evidence first, then use the table below to route from the test you ran into the repair or escalation path that actually fits. ScreenDetect only offers browser-based repairs for stuck pixels and mild OLED retention. Other results should move into damage or warranty paths.

Test you ran

Dead Pixel Test
When repair fits
Use repair only if the point stays bright or fixed-color across patterns. Dead black pixels are not software-repair candidates.
Repair or next step
Stuck Pixel Fixer

Test you ran

Backlight Bleed Test
When repair fits
Backlight bleed and IPS glow are not fixable in the browser. Move to return, warranty, or replacement with documented evidence.
Repair or next step
No browser repair available

Test you ran

Burn-In Test
When repair fits
Use repair only for mild OLED retention or light burn-in that survives retesting but still looks reversible.
Repair or next step
Burn-In Fixer

Test you ran

Touch Screen Test
When repair fits
Touch dead zones and unstable input usually point to hardware failure, not a browser repair workflow.
Repair or next step
No browser repair available

Test you ran

Screen Color Test
When repair fits
If the issue looks settings-driven (wash, crush, clip, tint, oversharpening), use Monitor Calibration. If it looks like a panel defect, open the matching specialist test instead.
Repair or next step
Monitor Calibration Tool

FAQ

Screen test FAQs

Detailed answers for workflow selection, evidence quality, and diagnostic reliability.