Transform any color image into grayscale (black and white). Choose from multiple conversion algorithms (Luminosity BT.709, Average, Desaturation, or single-channel extraction) and control the intensity of the effect. Preview results side by side with the original and download in PNG, JPEG, or WebP format. All processing happens in your browser.
Drop an image here or click to select
Supports PNG, JPEG, WebP, GIF, BMP, SVG
Upload an image by dragging it into the upload area or clicking to select. Choose a grayscale algorithm: Luminosity (most natural, based on human eye sensitivity), Average (simple mean of RGB), Desaturation (midpoint of min/max channels), or single-channel extraction (Red, Green, or Blue only). Adjust the intensity slider to blend between the original colors and full grayscale. The tool processes automatically as you change settings. Preview the result side by side and download.
Grayscale conversion is commonly used for: creating elegant monochrome prints and portfolio images, reducing visual distraction in UI design mockups, preparing images for black-and-white printing to save ink, adding a timeless aesthetic to photographs, preprocessing images for computer vision and machine learning, analyzing image brightness and contrast without color bias, creating visual hierarchy in design by desaturating background images, and artistic photography and social media content creation.
This tool offers multiple grayscale conversion methods. Luminosity (BT.709) uses the formula 0.2126R + 0.7152G + 0.0722B, which weights channels according to human perception of brightness - green contributes most because our eyes are most sensitive to it. The Average method uses (R+G+B)/3 for equal weighting. Desaturation calculates (max(R,G,B) + min(R,G,B))/2. Single-channel extraction uses only one channel's value for all three outputs. The intensity slider blends between original and grayscale using linear interpolation: result = original × (1 - intensity) + gray × intensity.
Luminosity (BT.709) produces the most natural-looking results because it weights RGB channels according to human perception. Green gets the highest weight (71.52%) since our eyes are most sensitive to green light. Use it for photographs and general-purpose conversion.
Grayscale (Luminosity) uses perceptual weights to calculate brightness, while Desaturation averages the lightest and darkest channel values. Desaturation tends to produce slightly different tonal ranges and can appear flatter than luminosity-based conversion.
Yes. Use the intensity slider to control the blend between full color (0%) and full grayscale (100%). Setting it to 50% creates a muted, partially desaturated look that retains some original color while appearing more subdued.
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