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Error diffusion

Sierra Lite dithering

The smallest Sierra kernel sends the error to just three neighbours. Fast, and coarser than Floyd–Steinberg, with more visible worms.

Good for speed.

Try Sierra lite on your image → Dithering algorithms compared

How it decides

      #  2
   1  1         ÷ 4

Three neighbours, one row ahead.

Sierra lite dithering applied to a photo of a lion
Slide to compare. A 0.7 mm cell on A5 with perceptual tone: 28,586 marks. Photo: Lion, Andreas Vonlanthen, 2025, Unsplash License.

Try it live

This runs in your browser. Change the algorithm, the number of cells or the threshold, or put a second algorithm next to it.

Sierra lite

Rendered in 0.0 ms on your machine. Every dot here is what a pen or laser would put down.

All algorithms

Every one is an option in the Dither style: dither an image online and export a 1-bit PNG for a laser or SVG dots for a plotter.