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Dead Pixel & Screen Test
Full-screen color fields to find dead or stuck pixels.
Click or press → to switch colors, Esc to exit.
Runs entirely in your browser. Nothing is sent anywhere.
How it works
- 1Open the tool — it works right on this page.
- 2Use the controls to start, stop or adjust it.
- 3Keep the tab open as long as you need it.
About this tool
Dead Pixel & Screen Test: Full-screen color fields to find dead or stuck pixels. It runs right on this page in your browser — no app to install and no account needed.
How do I use the Dead Pixel & Screen Test?
Open the tool — it works right on this page. Use the controls to start, stop or adjust it. Keep the tab open as long as you need it.
Is the Dead Pixel & Screen Test free?
Yes. It is completely free with no sign-up, no usage limits and no watermark.
Is my data sent to a server?
No. Everything is calculated locally in your browser. Nothing you enter is uploaded, logged or stored.
Does it work on my phone?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux — no app needed.