Screen Test - Free Online Screen Checker
Run a free online screen test for dead pixels, color problems, uneven brightness, image retention and touch issues on phones, laptops, monitors and TVs.
Quick answer
A screen test is a general visual check for dead or stuck pixels, uneven brightness, color problems, image retention and touch issues on phones, laptops, monitors, tablets and TVs.
Method: ScreenTestKit generates the test surface in your browser. Results depend on visual inspection; the site does not read or diagnose physical panel hardware.
How to use this test
- Clean the display and use the brightness level you normally prefer.
- Open black, white, red, green, blue and gray screens in fullscreen mode.
- Look for fixed dots, tint, uneven areas, persistent marks and touch gaps.
- Continue with the focused pixel, bleed, uniformity, motion or touch test that matches the symptom.
What to watch for
- Fixed black or bright dots that remain in the same physical position.
- Uneven brightness, edge light, color tint, banding or retained interface shapes.
- Touch lines that break repeatedly in the same area on a touchscreen.
How to interpret results
Fixed dot
Clean the panel and compare the same point on several colors before using the dead pixel test.
Uneven area
Compare black and gray screens with the backlight bleed and uniformity tests at normal brightness.
Motion or touch issue
Use the focused refresh, ghosting or touch test and repeat the result before judging the hardware.
Frequently asked questions
What does an online screen test check?
It helps you visually check pixels, brightness, color, image retention, motion and touch behavior without installing software.
Can it automatically diagnose a broken screen?
No. The browser creates test patterns, but you inspect and interpret the physical display yourself.