Source: https://restorebunny.com/tools/duotone-image/

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# Duotone Image

Choose separate shadow and highlight colors to make a duotone poster image. The result maps luminance between the two endpoints.

Free · No signupLocal browser processing

**Choose a photo**Up to 16 MP per photo · 20 MB per file · 80 MB per batch

Shadow colorHighlight color

**Result**Ready for your input

Your result will appear here

No signup or server upload.

Duotone is a creative effect, not historical color recovery. Keep an unchanged source and check text contrast separately.

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## How to use duotone image

1. Choose your source file or files from this device.
2. Adjust the controls and inspect the result.
3. Download the output shown by the tool; keep the original files.

## A practical example

With navy shadows and cream highlights, black becomes navy, white becomes cream, and midtones interpolate between them. This creates a design interpretation.

## Frequently asked questions

Is duotone image free to use?

Yes. This utility works without a signup or paid credit. Files and calculations are processed in this browser.

What should I check before using the result?

Duotone is a creative effect, not historical color recovery. Keep an unchanged source and check text contrast separately.

## Keep working on your photo

- [Browse all free tools](<https://restorebunny.com/tools/>)
- [Check photo resolution](<https://restorebunny.com/tools/photo-resolution-checker/>)

[Browse all free tools](<https://restorebunny.com/tools/>)

By RestoreBunny · Reviewed 2026-10-16. Utilities use local calculations or [browser image processing](<https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas>). The download button identifies the output format. Animated images export one decoded frame. Keep your original files.