Duotone image converter

Map a photo's tones onto a two-color gradient — pick the shadow and highlight colors for a print-poster look.

The image stays in this browser. Nothing is uploaded or stored.

PNG, JPG, or WebP up to 25 MiB. Maps each pixel's luminance onto a two-color gradient — darks take the shadow color, lights the highlight color. The pivot shifts where mid-grey falls. Output keeps the input format; transparency is preserved in PNG/WebP.

How to use

  1. Choose an image.
  2. Pick the shadow and highlight colors (and midtone pivot).
  3. Apply and download.

What it supports

PNG/JPG/WebP up to 25 MiB. Each pixel's luminance maps onto the shadow→highlight gradient; the pivot shifts the midpoint. Output keeps the input format and PNG/WebP transparency.

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