This tool applies a duotone effect to your photos directly in the browser. It maps the tonal range of an image into a smooth gradient between two colors, creating a bold, graphic look.
Your images are never uploaded to a server, ensuring fast and private conversion.
Shadow and highlight colors
Define the two color effect by selecting a Shadow Color for the darker regions and a Highlight Color for the brighter areas. You can use the visual color pickers or enter exact hex codes to match your brand visuals.
To find a harmonious pair quickly, click Surprise me ✨ to generate a balanced palette. Dark, contrasting pairs create clean, modern looks, while softer tones produce a more retro, editorial poster effect.
Tonal balance
Use the Balance slider to shift the two color filter toward either the shadow or highlight. Lower values favor the shadow color, creating a darker, moodier image filter. Higher values emphasize the highlight color for a brighter, punchier result.
Adjusting the balance is especially useful for maintaining readable text overlays on duotone backgrounds. Once the tones are set, export the duotone image online instantly in its original format.