Screen printing
Films with no grey: every dot either prints or it does not.
Free tool
Dither image
online
Turn a photo into two-colour dithering, where shades become a scatter of dots. Six algorithms, your own pixel size and colours, PNG download.
Original
PNG size
Need 12-ink separation, an underbase or films? Open the full editor
How to use it
Three steps
- 1
Upload an image
JPG, PNG or WebP. Drag a file in, paste from the clipboard or start from an example.
- 2
Adjust
The result updates instantly. Drag the divider to compare with the original.
- 3
Download a PNG
Up to 4000 px on the long side, on a transparent or coloured background. No watermark.
Where it helps
For print, engraving
and design
Laser engraving
Photos for engraving wood, leather and metal: a laser burns dots, not shades.
Riso and zines
Halftones for spot-colour printing and self-publishing.
Posters and social
A retro print look for covers, posters and merch.
FAQ
Frequently asked questions
01What is dithering?
A way to show shades with just two colours: instead of grey you get a pattern of black and white dots, and the eye blends them into a tone.
02Which algorithm should I pick?
Atkinson gives a crisp, high-contrast look like early Macs. Floyd–Steinberg, Stucki and Sierra render tone more smoothly. Bayer draws an even, retro grid pattern.
03Is it good for laser engraving?
Yes. A laser cannot do shades; it either burns a dot or it does not, which is exactly why engraving photos are prepared with dithering. Match the pixel size to your laser’s step.
04Are my photos uploaded anywhere?
No. Everything runs in your browser; the file never leaves your computer.
05Is it free?
Yes. The tool is free, with no sign-up and no watermark.
Need more than one effect?
The full editor adds separation up to 12 inks, underbase, trapping, vintage, films and SVG.