How to convert a color photo to grayscale

1. Upload your image

   Drop the photo into the Image field. Any format Sharp can decode works — JPEG, PNG, WebP, HEIC, AVIF, GIF, etc.

2. No options to configure

   The conversion is deterministic: Sharp's grayscale operation applies a standard luminance transform (Rec. 709 weights) to each pixel. There's nothing to tune.

3. Press Run

   Output is a single-channel JPEG at quality 92. Colour information is discarded permanently in the output file — there's no going back from this JPEG to the original colours.

4. Use the result

   Good for print previews, B&W aesthetic, or stripping colour bias before OCR. If you wanted a duotone or sepia, this isn't that — use a photo editor for tinted monochrome.