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About Screen Issues
Free Online Screen Test Tool - Instantly diagnose dead pixels, lines, color issues, and flickering. Multiple test modes, no download needed.
- Who it is for
- Anyone checking a new or used monitor, laptop, TV or phone screen for defects.
- Problem it solves
- Spotting dead pixels, lines, color issues and flicker is hard without dedicated test patterns or software.
- The solution
- It provides multiple full-screen test modes in the browser so you can diagnose display problems instantly, with guides explaining what you see.
- What makes it unique
- Completely free, browser-based screen testing utility with no download or signup needed.
Features
Dead pixel test
Full-screen solid colors to spot dead, stuck and bright pixels.
Details
- Platforms
- Web
- Pricing
- Free
- Built for
Anyone checking a new or used monitor, laptop, TV or phone screen for defects.
- Building since
2026
Technology
Screen Issues product screenshot 1
1 / 2Website performance
Independent mobile lab measurements and permanent weekly competition results from IndieTools Speed.
57GoodMobile Lighthouse
Last checked
- Load time
- 701 ms
- FCP
- 3.68 s
- LCP
- 10.57 s
- CLS
- 0.000
- TTFB
- 5 ms
- TBT
- 272 ms
- Speed index
- 6.26 s
Latest Performance Score: 57. Measured: October 6, 2026. Weekly Overall Rank: not finalized. LCP: 10.57 s. Load Time: 701 ms.
- Overall rank
- Not finalized
- Best overall rank
- Not finalized 0 top 10 finishes
- Best category rank
- Not finalized 0 category wins
- Latest change
- +4 score No finalized score yet
Website performance history
Inspect every successful mobile Lighthouse lab measurement by metric and date range.
Range
Metric
Latest score
57 / 100
Higher is better
5 measurements
Use the left and right arrow keys to inspect measurements. Use Home or End to jump to the first or last measurement. Press Escape to dismiss the chart tooltip.
Oct 5, 2026Oct 6, 2026Related products
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