Convert an image to grayscale

Remove hue by rendering the raster through a full grayscale filter.

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ToolGrayscale Image
Input
Output
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How it works

Canvas applies a grayscale filter and redraws at the original width and height. RGB channels collapse toward a luminance neutral while alpha remains part of the rendered pixels.

  • There is no strength control: the effect is full grayscale.
  • PNG encodes the transformed raster.

Worked example

Render grayscale
Input
											data:image/png;base64,iVBORw0KGgo=
Output
												PNG data URL with RGB mapped to grayscale

When to use this

Photo editors create monochrome versions, print previews check no-colour composition, and design reviews test luminance structure.

Edge cases

  • Already gray pixels remain visually unchanged.
  • Hue information cannot be recovered from the output.
  • JPEG input is decoded and exported as PNG.

References