Map image shadows and highlights to two colors
Create a two-color duotone by mapping dark pixels to a shadow color and bright pixels to a highlight color with client-side Canvas processing.
Use this tool freeBrowser tool
Duotone image tool
Runs locally in your browser. The selected image is not uploaded by this tool.
JPEG, PNG, and WebP are supported by default. Specialized converters restrict the file picker to their required input format.
How to use
Upload an image
Choose a JPEG, PNG, or WebP file from your device.
Choose colors
Pick the shadow and highlight colors for the duotone map.
Apply
Click the apply button to render the duotone image in Canvas.
Download
Save the duotone image from the browser.
Features
Two-color mapping
Choose custom shadow and highlight colors for JPEG, PNG, or WebP images.
Private by design
The image is decoded, transformed, and exported locally with browser APIs.
Download a copy
Keep the original untouched and save the duotone result as a new image file.
After this task
After this free tool, open Ai Filter for the next AI editing workflow.
Continue with Ai FilterSpecifications
| Input formats | JPEG, PNG, WebP |
| Output formats | JPEG, PNG, WebP |
| Filter | Custom shadow/highlight duotone |
| Processing | Client-side Canvas |
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Common questions
Are my images uploaded?
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No. The duotone mapping runs locally in your browser using File, Canvas, Blob, and object URL APIs.
Does this overwrite my original image?
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No. The tool creates a new downloadable duotone copy and leaves the original file unchanged.
Need more color styles?
Use AI Filter when you want richer creative styles, film color, grain, and AI looks after a simple duotone edit.
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