ENPTES

Turn a photo into a duotone without uploading it

Pick a color pair and download. Dark pixels take one color and light pixels take the other. The picture stays in this tab.

Runs in your browser Free No sign-up
  1. Choose file
  2. Set options
  3. Get result

Your file never leaves your device. Processed locally in your browser. Nothing is uploaded. Location and camera metadata (EXIF) are removed from the result.

Dark pixels take the first color and light pixels take the second. Width and height stay the same. Transparent pixels turn white only if you save JPG. Camera location is not copied.

How to make a duotone image

1. Drop one or more JPG, PNG or WebP files. Audio and video are refused here. 2. Leave Navy and gold, or pick Ink and rose or Forest and sand. 3. Leave the format on “Same as original”, or pick PNG when you need a clear background. 4. Press “Make duotone” and download each file, or a ZIP if there are several.

GustKit reads the brightness of each pixel and mixes the two colors on a canvas in this tab. Black becomes the dark color. White becomes the light color. A mid gray lands between them. Width and height stay the same. Camera location is not copied.

Duotone is not sepia or grayscale

Grayscale image removes color and leaves brightness. Sepia image pushes the photo toward brown. This page replaces both ends of the brightness scale with two colors you pick. Invert colors flips each channel and does not choose a pair. Adjust brightness moves the light and keeps the original hues.

The photo stays in this tab

Nothing is sent to a server to be edited. Close the tab and the picture is gone. A photo over the megapixel limit on the page is refused, because the canvas has to hold every pixel.

How to check the two colors before you post the photo

1. Open the original and the download at the same zoom. 2. A white area should be the light color of the pair. A black area should be the dark color. 3. If a logo lost its clear background, run again and save PNG.

Sepia image pushes the photo toward brown. Grayscale image only removes color. This page maps brightness onto two colors. Nothing is uploaded.

Frequently asked questions

Will a white background become the light color?

Yes. White is the light end of the pair. Navy and gold turns a white page gold. Black type on that page becomes navy.

Why does a PNG logo pick up a white background in JPG?

JPG cannot store transparency. Empty pixels are filled white, then mapped to the light color. Stay on PNG if the background should stay clear.

Can I duotone several photos at once?

Yes. Drop a batch up to the limit on the page and download a ZIP.

Is the photo uploaded?

No. The canvas runs in this tab.

The photo is gold and navy and the size did not change. Did it work?

Yes. Navy and gold maps white toward gold and black toward navy. Width and height stay the same.

Can I make a duotone and also crop in one step?

No. Make the duotone first, or crop first, then open the other page on the download.