Grayscale Image Converter

Grayscale Image Converter

Convert any image to grayscale using high-quality luminance-based pixel manipulation. Uses the ITU-R BT.601 standard (0.299R + 0.587G + 0.114B) for accurate perceptual grayscale conversion. Toggle between grayscale and original with live preview.

Related: Sepia Image Compress Image Image Info
About grayscale conversion

Grayscale conversion removes color information while preserving luminance. This tool uses the industry-standard ITU-R BT.601 luminance weights rather than simple averaging, resulting in a grayscale image that matches how the human eye perceives brightness.

  • High-quality luminance-based conversion (ITU-R BT.601)
  • Toggle between grayscale and original
  • Live preview of the filter effect
  • Works with JPG, PNG, WebP, and more
  • Preserves original image dimensions
  • 100% private — your images never leave your device

100% free. No signup. No data uploaded anywhere.

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