Screen Color Test

Test color purity, gradients and saturation

Full 0–255 ramps for each color channel, plus a full hue sweep — useful for spotting banding, tinting, or oversaturation.

Red

Green

Blue

Hue

More display

Display

FPS Test

Benchmark browser rendering with stress test

Display

Refresh Rate Test

Detect your monitor's refresh rate (Hz)

Display

Dead Pixel Test

Check and fix dead or stuck pixels