Dead pixel test

Fill the screen with solid colors to inspect pixels.

Privacy: runs in your browser

This tool processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Favorites store only tool names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. When a button sends your result to another tool, it waits in this tab until that tool opens it, for up to a minute, and is then deleted.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

English

Screen color

Custom color

Manual order: black, white, red, green, blue, custom. The sequence wraps at either end.

Use the arrow keys to change color. Esc leaves fullscreen.

Your result

Look across each solid color

Use black, white, red, green, blue and your own custom color to make fixed bright or dark points easier to notice. Advance colors yourself; there is no flashing sequence. Fullscreen removes most browser controls when supported.

Next: Color picker

Worked example

A pixel that stays dark on the white field behaves differently from one that stays red on every field. Clean the screen so dust is not mistaken for a pixel.

Before you rely on the result

This is a visual inspection aid, not a repair. Press Esc or Exit fullscreen to leave the field. Display scaling and browser behavior may affect what you see.

Cite this page

Citation style

ToolOctopus. “Dead pixel test.” Updated 2026-10-11. https://tooloctopus.com/dead-pixel-test.

Add an access date if your instructions require one.

Citation formatting uses citeproc-js by Frank Bennett and Citation Style Language styles. License and source code.