Duotone Effect
Map a photo to a two-color duotone.
Duotone Effect is a free, browser-based tool on Toolery. Map a photo to a two-color duotone. Everything runs locally on your device, so it's fast and completely private — no uploads, no queues, and no sign-up to try it.
Duotone Effect — FAQ
Is Duotone Effect free to use?
Yes. Duotone Effect is completely free on Toolery — no watermarks and no sign-up required to try it.
Is Duotone Effect private — do my files stay on my device?
Yes. Duotone Effect runs entirely in your browser. Your files and input are processed on your own device and never uploaded to a server, so nothing is stored, seen, or shared.
How do I use Duotone Effect?
Map a photo to a two-color duotone. Open the tool, add your file or input, and get the result instantly — it all happens on your device.
Does Duotone Effect reduce image quality?
Duotone Effect preserves as much quality as the format allows and gives you control where it applies. It works on your original file directly in the browser, so there's no extra loss from uploading and re-downloading.