Duotone Image
Map your photo to two colours — one for shadows, one for highlights — for a bold, graphic look inspired by Spotify posters and editorial design. Free, private, and instant — processed in your browser, never uploaded.
Upload an image
Drop image here
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Options
Classic duotone mapping
Each pixel's luminance is used to blend between a shadow colour and a highlight colour, producing a smooth two-tone gradient across the entire photo.
100% private
Your image is processed entirely in your browser using the Canvas API — nothing is ever uploaded to a server.
Free and unlimited
No signup, no watermark, no daily limit. Process as many images as you like.
How to create a duotone effect
Upload your image
Drag and drop or click to select a JPG, PNG, or WebP image.
Choose your colours
Pick a shadow colour (applied to dark areas) and a highlight colour (applied to bright areas) using the colour pickers.
Pick a format
Choose PNG to keep transparency or JPG for the smallest file size.
Download
Click download to save the duotone image to your device.
Frequently asked questions
What is a duotone effect?
A duotone remaps a photo to two colours — one representing the shadows and one representing the highlights. The luminance of each pixel determines how to blend between the two, creating a bold, graphic image made of exactly two hues.
Is the duotone tool free?
Yes — completely free and unlimited. No signup, no account, no watermark, no daily limit.
Are my files uploaded to a server?
No. The duotone effect is applied entirely in your browser on your device. Your image never leaves your computer, so it stays fully private.
What colour combinations work best?
High-contrast pairs create the most striking results: dark navy or black for shadows with a bright accent (pink, orange, cyan) for highlights. You can also try complementary colours on the colour wheel for a vibrant effect.
Create a duotone from another image
Drop in a new photo to apply a two-tone colour map — free and unlimited, no signup required.
Choose The Right Tool
Why this page exists
Use duotone to map a photo to two colours — one for shadows, one for highlights — for a bold, graphic look popularised by Spotify posters and editorial design.
Best for
- Spotify-style duotone posters and music artwork
- Bold graphic design and editorial photo treatments
- Brand-colour image campaigns with a striking two-tone aesthetic
Related tools people usually need next
Colorize Image
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Hue Rotate
Shift every color around the wheel
Shift all colours around the wheel instead of applying a two-tone map.
Image Filters
Apply photo effects and filters
Combine the duotone with other photo effects in one place.