Screen Resolution Test
Read CSS screen size, available area, viewport, pixel ratio, estimated physical pixels, color depth and orientation.
Open test →SCRefresh Rate Test
Estimate display refresh rate from requestAnimationFrame timing after a three-second warm-up and five-second sample.
Open test →SCDead Pixel Test
Inspect the display manually with solid black, white, red, green, blue, gray or custom colors in an ad-free fullscreen mode.
Open test →SCStuck Pixel Test
Use controlled solid colors to look for pixels that remain fixed on one subpixel color.
Open test →SCScreen Color Test
Display solid colors, grayscale steps, black level and white level patterns for a practical visual check.
Open test →SCGradient Test
Display grayscale and RGB gradients to look for visible banding or abrupt tonal transitions.
Open test →SCColor Depth Test
Show browser-reported color and pixel depth with a visual gradient reference.
Open test →SCScreen Orientation Test
Track the browser-reported orientation type, angle and viewport while you rotate or resize the device.
Open test →SCPrinter Test Page
Open a clean print sheet with text, grayscale, color, alignment and margin references using your browser print dialog.
Open test →What these browser tests can tell you
These tools show events, streams and capability values made available by your browser. They are useful for reproducing a problem and comparing behavior, but they do not certify a component or replace repair diagnostics.
Run a test more than once and, when practical, compare another current browser, port, cable or device. Each tool page gives a more specific interpretation and troubleshooting sequence.