Duotone Image Maker

Recolor photos using custom shadow and highlight colors.

Tool options · presets, sharing & more

Presets & sharing: options only, never files, text or passwords. Undo/redo: editable form values, not file selection or generated results.

How to Use Duotone Image Maker

Choose an image; collage accepts multiple photos and diff requires two.

Adjust colors, dimensions, captions, or effect settings.

Run the tool and inspect the preview or comparison report.

Download the PNG result or individual image tiles.

What This Tool Does

Recolor photos using custom shadow and highlight colors. Maps pixel luminance between your shadow and highlight colors. The result is a raster PNG, not a vector graphic.

Common Use Cases

Preparing social, product, and presentation images.

Reviewing image edits before downloading the PNG result.

Privacy & Processing

This tool processes files and input in this browser tab. Its processing code does not upload them to a server. Loading this page and fetching uncached app files uses an internet connection. Optional usage analytics requires your consent and excludes input, filenames, passwords and generated content. Form undo history and result transfers stay in session memory. Explicitly saved presets contain approved settings only.

Offline use is not verified for this tool. Keep an internet connection available to load its page, code and any additional dependencies.

Frequently Asked Questions

What should I check before using the result?

Maps pixel luminance between your shadow and highlight colors. The result is a raster PNG, not a vector graphic.

Are my files or inputs uploaded?

No. This tool processes selected files and entered data locally in your browser. Only the page and its supporting code are downloaded.

Does this tool work offline?

Offline use is not verified for this tool. Keep an internet connection available to load its page, code and any additional dependencies.