Duotone Image Effect Online Free
Runs 100% in your browser — your files never leave your device.
Build a striking two-tone hero image, match an illustration to a brand palette, or give a photo a modern editorial feel. Shadows map to your first color and highlights to your second, with everything in between blended smoothly. It all runs on your device.
How it works
- 1
Add your image
Drop a JPG, PNG, or WebP into the box or click to browse. Nothing is uploaded.
- 2
Apply duotone it
Tune the control until the effect looks right on your image.
- 3
Download the result
Click to apply and download the edited image in its original format.
About this tool
How the duotone map works
Duotone maps the brightness range of your photo onto two colors you pick: shadows take the first color, highlights take the second, and every tone between blends smoothly across the pair. The luminance structure of the image stays; only the palette changes.
When to reach for it
Duotone turns photos into on-brand hero images, unifies a set of unrelated pictures into one palette, and gives editorial layouts a sophisticated two-ink look. Classic pairings: navy-and-gold for premium, teal-and-coral for modern, black-and-red for bold.
Tips for the best result
Pick colors with real contrast between them — a dark shadow color and a light highlight color keep the image readable. If the result looks flat, your two colors sit too close in brightness; swap the highlight for something lighter.
Frequently asked questions
Which colors work best for duotone?
Any pair where one is clearly darker than the other. High-contrast pairs keep faces and subjects legible; low-contrast pairs turn moody but can lose detail in the middle tones.
Will the original file change?
No — the duotone effect is applied to a working copy in memory. Your original file stays untouched on your device, and the download is a brand-new file.
Which formats and sizes work?
JPG, PNG, and WebP files up to 50 MB. The result downloads in the original format with dimensions unchanged.
Can I use duotone on a logo or flat graphic?
Yes — flat graphics map cleanly, since their few tones spread neatly between your two colors. Multi-color logos lose their original palette entirely; that is the point of the effect.