Ditherlicious Help


Ditherlicious crushes images to pure 1 black/white 1 bit using dithering.

It is developed by Jonas Wagner. You can read more about it in this blog post.


Open an image by drag & dropping it onto the page or by clicking Open Photo.

Please note that the differences between the conversions can be subtle. You will need a decent monitor to appreciate them.

Black & White Conversions


Straight black and white conversion using the relative luminance values of the sRGB Primaries.

Y = 0.216R + 0.7162G + 0.0722B


Conversion using the following coefficients:

Y = 0.333R + 0.333G + 0.333B

Red Filter

Conversion using the following coefficients:

Y = R

Green Filter

Conversion using the following coefficients:

Y = G

Blue Filter

Conversion using the following coefficients:

Y = B


The contrast option increases the contrast of the image by moving the black and white points.


The exposure slider increases the brightness of the image by multiplication in the linear space.


The dithering algorithm used in this tool is stucki dithering. There are some additional hacks for dealing with the boundaries of the image but they are not perfect.


Are my images uploaded to your server?

No! I respect your privacy. All of your images stay on your computer. They are never uploaded to any cloud or server.

Can I open RAW images using this app?

No, RAW images are not supported. The highest quality format you can use is 24-bit PNG. PNG images are also saved as PNG to minimize losses. If you need support for higher bit depths or RAW please have a look at the gmic plugin for the gimp.


1.0.0 (2016-07-07)

  • Initial release


Open Source Libraries

This software was built using the following open source components. I want to thank all of their authors for making my life easier and projects like this possible.

Fonts / Icons

Demo Image

The demo image is a scanning electron microscope image of a walnut leaf.


You can find my contact details on 29a.ch/about.