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Dead Pixel Test

Cycle fullscreen solid colors to make dead, bright, or stuck pixels easier to spot.

This tool runs in your browser.
This test runs locally in your browser. Device input is not uploaded.

This is a visual aid. Inspect the screen yourself; the browser cannot diagnose panel defects.

How to use

  1. 01Open the test and read the local-only notice.
  2. 02Start the test, then interact with the device while watching the live result.
  3. 03Stop the test or close the page to release any active device access.

FAQ

Does Dead Pixel Test upload device data?

No. Processing stays in your browser and no captured media or device events are uploaded.

Why can results differ from hardware specifications?

Browsers, operating systems, permissions, power saving, and event scheduling can affect measurements.

Dead Pixel Test: Why does this test need browser permission?

Camera, microphone, motion, and similar tests require an explicit browser permission before the page can read that device. Denying permission keeps the device unavailable to the test.