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Image Studio

Black and white (grayscale)

Turn colour photos into grayscale using standard luminance weights, with an optional contrast boost.

  1. 1Add your image files
  2. 2Pick options
  3. 3Click Run
  4. 4Download result

Limits

  • Uses Rec. 709 luminance (0.2126 R + 0.7152 G + 0.0722 B) on the stored colour values.
  • Saved in the original format; JPEG is re-encoded.
  • Animated GIFs keep only their first frame. HEIC/HEIF photos are not readable by most browsers; export them as JPEG first.
  • Everything runs on your device; images are never uploaded. Very large batches may be slow on phones.

Ask the AI chat

The AI chat can run this tool for you. Try:

  • “make these photos black and white”
  • “convert this image to grayscale”
  • “turn my picture monochrome”

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