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Grayscale

Converts an image to grayscale with a choice of luminance weights.

Converts an image to grayscale using ITU-R BT.601 weights (the standard “perceptual gray” formula). The result preserves the original format. Runs in the browser, no upload.

Related tools

More tools in the “Color” category.

Eyedropper

Picks the color of any pixel — HEX, RGB, HSL.

Color palette

Extracts dominant colors: 2–16 hues sorted by area share.

WCAG contrast checker

Checks contrast between two colors against WCAG 2.1 — AA and AAA for normal and large text.

Image histogram

Visualizes the tonal distribution across R/G/B and luminance channels with median, mean and clipping percentages.