Image to Grayscale

Drop in an image (PNG, JPG, WebP, GIF, BMP, AVIF) and download a grayscale version. Pick from four standard algorithms: Luminance (the perceptual default — closest to how the human eye weighs RGB channels), Average (a flat mean of R, G, B), Lightness (the midpoint of max and min channel — softer contrast), and Desaturation (HSL-style saturation removal). Output format matches the input where possible, defaulting to PNG. Everything runs locally in your browser.