Use the free Image Dithering Tool below: upload a photo, adjust the settings, and download your result as a PNG. Your image never leaves your browser — all editing happens on your device, and nothing is uploaded to any server.
What this tool does
Some of the most striking images online look like they came from an old computer or a photocopied zine: harsh black and white, visible dots, and a rough texture that feels deliberate rather than broken. That look is called dithering, and this free Image Dithering Tool creates it from any photo in seconds. It works in your browser, so your photo never leaves your device, and the result downloads as a PNG you can post, print, or use in a design.
Dithering is a trick for showing shades with very few colours. A normal photo has millions of shades, but a dithered image may have only two, four, or eight levels. Instead of simply rounding every pixel to black or white, which would destroy detail, dithering spreads the rounding error to neighbouring pixels or arranges dots in a pattern. Your eye then blends the dots back into shades. That is why a dithered portrait still looks like a face even though it contains only black and white dots.
This tool offers four methods, and each has its own character. Floyd-Steinberg is the classic error-diffusion method, and it gives smooth, detailed results that suit portraits and landscapes. Atkinson, used by early Macintosh software, spreads less error, so it gives a lighter, airier look with stronger contrast. Bayer 4×4 and Bayer 8×8 are ordered methods that lay dots in a fixed grid, which gives a very regular, retro texture that works beautifully for posters and album art. Try the same photo with each method, because the best choice depends on the picture and on your taste.
Levels matter as much as method. Two levels gives the starkest 1-bit look, with pure black and white and nothing in between. Four or eight levels keep more shade information and look softer, while still keeping the dotted texture. Colour dithering applies the same idea to each colour channel, which can produce strange, beautiful colour effects, while grayscale dithering is the classic choice for a clean retro poster. Start with Floyd-Steinberg at two levels in grayscale, then change one setting at a time so you can see what each control does.
Dithered images are popular for good reasons. They print well in one colour, they look sharp at small sizes, and they hide noise in low-quality photos instead of showing it. Designers use them for posters, flyers, and social graphics, and musicians use them for cover art. They also compress well and load fast, which is useful for web graphics. Because the tool is free and needs no account, you can dither a whole set of photos in one sitting and pick the strongest results.
One practical tip is to start with a photo that has strong light and shadow. Dithering loves contrast, and a flat, grey photo will turn into a flat, grey dither. If your photo looks dull, increase its contrast first in any photo editor, then dither it. Very small text and fine detail can also break up into dots, so dithering suits bold images better than documents. With the right photo, though, the result can look far more expensive and intentional than the simple process behind it.
Good ideas to try
- A portrait in Floyd-Steinberg black and white makes a striking profile picture or poster.
- Bayer 8×8 gives album art and flyers a regular, retro dot texture.
- Colour dithering at four levels creates unusual, eye-catching social graphics.
- A high-contrast landscape survives dithering far better than a flat, grey photo.
- Dithered graphics print cleanly in one colour on shirts, stickers, and flyers.
Questions people ask
What is the difference between Floyd-Steinberg and Bayer?
Floyd-Steinberg spreads rounding error to nearby pixels for a smooth result, while Bayer places dots in a fixed pattern for a regular, retro texture.
Why does my dithered photo look noisy?
Dithering is supposed to look dotted. If it looks messy, try a photo with stronger contrast, or switch from two levels to four.
Can I use the result commercially?
Yes, the PNG you create from your own photo is yours to use in your own designs and posts.