Image → Grayscale
Convert a color image to grayscale and choose how colors map to gray.
Drop your image here
or click to choose a file — JPG, PNG, WebP, GIF, BMP, SVG, HEIC, TIFF or AVIF
● Your files are processed locally in your browser and are not uploaded to our servers.
How it works
There's no single “right” grayscale: luminance weights green most because our eyes are most sensitive to it, giving the most natural result. Average is flatter. A single channel mimics black-and-white photography with colored filters: the red channel darkens skies and lightens skin.
FAQ
Which is closest to Photoshop's “Grayscale” mode?
Luminance Rec. 601 is close to the classic conversion; Rec. 709 matches modern sRGB screens.