Screen Color Test - Free Online | ToolXHub
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About this tool
Screen Color Test is a free online utility tool. Display solid colors/gradient scales fullscreen to detect dead pixels. An everyday helper that saves you time. It runs entirely in your browser — no download or sign-up needed.
Suitable for scenarios such as newly purchased display testing, notebook screen acceptance, and post-repair screen testing. It is recommended to use it in a dark room environment, where light leaks and defective dots can be easily found.
Supports full-screen display of solid colors such as red, green, blue, white, and black, which is used to detect bad dots (bright/dark dots) and light leaks on the LCD screen. Progressive levels and gradient modes are also available to help evaluate the smoothness of the display's color transition.
After the page enters full-screen mode, you can switch colors and modes through touch or keyboard. All colors are rendered directly in the browser using CSS background colors without installing any software.
Display solid colors, levels or gradients full-screen to quickly spot dead pixels, light bleed and uneven display colors.