Test your screen, camera, audio and hardware with confidence.
Run professional browser-based diagnostics for monitors, TVs, laptops, desktops, phones, tablets and connected accessories—without installing software.
Quick solid-color pixel test
Use full-screen colors and inspect every area. Click the screen or use arrow keys to move between patterns.
What is DeadPixelTest.net?
DeadPixelTest.net is a free browser-based diagnostics suite for screens, cameras, audio, keyboards, mice, touchscreens, sensors and connected devices. Most tests run locally without requiring installation.
Choose a test
Each test is optimized for speed, touch screens and keyboard navigation.
Touch Screen Test
Check touch coverage, dragging continuity and screen dead zones.
Device Life Checker
Estimate device age and remaining useful life from purchase details.
Keyboard Tester
Test desktop, laptop and external keyboard keys instantly.
Pixel Exerciser
Exercise a suspected stuck-pixel area with rapidly changing colors.
Gradient Test
Check color gradients, banding and tonal transitions.
Brightness & Contrast
Check shadow detail, white saturation and contrast separation.
Screen Size Test
View viewport, resolution, pixel ratio and estimated display data.
Text Sharpness Test
Inspect text rendering, scaling and subpixel clarity.
Motion & Ghosting Test
Observe motion blur, ghosting and response behavior.
Resolution & Scaling
Check screen resolution, CSS pixels and browser scaling.
Mouse Tester
Test buttons, wheel, pointer movement and double-click timing.
Audio Tester
Test left/right speakers, stereo balance, tones and microphone input.
Screen Effects
Run useful full-screen lighting and color effects.
Test cameras and connected devices
Check laptop and phone cameras, USB webcams, microphones, touchscreens, sensors, browser features and network behavior.
How to test for dead pixels
- Clean the screen gently and remove dust that could look like a pixel defect.
- Set normal brightness and reduce reflections in the room.
- Open each solid color in full-screen mode.
- Inspect the center, corners and edges for pixels that remain black, white or a fixed color.
- Repeat suspicious areas on contrasting colors before deciding that a defect exists.
Choose another test
Move between screen, camera, audio and device checks without returning to the homepage.
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