# Duotone Effect Online - Gradient Map Your Images

> Free online duotone tool: map brightness to a gradient between two or three colours, with 10 ready-made schemes or your own shadow and highlight colours.

- URL: https://qilingtools.com/en/image/duotone
- Category: Image Tools (https://qilingtools.com/en/image)
- Tags: [Image](https://qilingtools.com/en/tags/image), [Creative Effects](https://qilingtools.com/en/tags/effects)
- Last updated: 2026-10-26
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

Duotone is a favourite look for posters, album covers and brand design: the image is reduced to its lights and darks, then the darkest parts are mapped to one colour and the brightest to another, blending smoothly in between. Pick one of 10 attractive colour schemes with a click, choose your own shadow and highlight colours, or add a mid-tone for a three-colour gradient map. The contrast slider adds punch and the strength slider blends with the original. Apply the same scheme to many images to keep a set consistent.

## How to use

1. Drop in one or more images
2. Click a colour scheme or pick your own colours, then adjust contrast and strength
3. Click Apply duotone and download

## Features

- 10 preset colour schemes
- Custom shadow / mid-tone / highlight colours
- Adjustable contrast and strength
- Batch processing, runs locally

## FAQ

### How is duotone different from black and white?

Black and white maps brightness from black to white; duotone maps it to a gradient between two colours of your choice, such as navy to pink, for a more designed look.

### How do I make the effect stronger?

Choose two colours with a big difference in brightness and raise the contrast. Portraits and architectural silhouettes work especially well.

### Are my files uploaded?

No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.

### Do I need to sign up or pay?

No. The site is completely free, needs no account, has no usage limits and adds no watermark.

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