# WhiteScreenTest

> Free online white screen test and full-screen color tool for checking any phone, laptop, monitor or TV for dead pixels, stuck pixels, backlight bleed and lines — runs in the browser, no install, no sign-up.

WhiteScreenTest offers eight full-screen solid colors (white, black, red, green, blue, yellow, purple, cyan) plus guided screen diagnosis tools. A white screen reveals dead pixels, dust and uneven brightness; a black screen reveals stuck pixels and backlight bleed. Dedicated guides explain how to tell dead pixels, stuck pixels and dust apart, how to diagnose a line on the screen for iPhone, Samsung and laptop devices, how to judge laptop backlight bleed against normal IPS glow, and how to run a complete monitor test with dead pixel, gradient, grayscale, refresh and uniformity modules. Pure color images can be downloaded in 1080p and 4K, generated locally on the user's device.

## Tools

- [White Screen Test](https://whitescreentest.app/): 8 full-screen colors, one-tap display check
- [White Screen](https://whitescreentest.app/white-screen): full screen white for brightness checks, fill light and photo backdrops
- [Black Screen](https://whitescreentest.app/black-screen): full screen black for stuck pixels, backlight bleed and OLED care
- [Purple Screen](https://whitescreentest.app/purple-screen): full screen purple (#800080) for uniformity and tint checks
- [Color Screen Test](https://whitescreentest.app/color-screen-test): switch all 8 full-screen colors with keyboard
- [Lines on Screen](https://whitescreentest.app/lines-on-screen): why is there a line on my screen — 5-test diagnosis
- [Laptop Screen Bleeding](https://whitescreentest.app/laptop-screen-bleeding): 30-second backlight bleed test and warranty guidance
- [Monitor Test](https://whitescreentest.app/monitor-test): dead pixels, gradients, grayscale, refresh rate and uniformity
- [Fake Broken Screen](https://whitescreentest.app/fake-broken-screen): harmless full-screen cracked-glass prank

## Optional

- [Privacy Policy](https://whitescreentest.app/privacy-policy): how data is handled (tools run entirely in the browser)
- [Terms of Service](https://whitescreentest.app/tos): terms of use for the free tools