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Ordered dithering

Blue noise dithering online

Ordered dithering against a 128×128 blue-noise mask instead of a Bayer tile. Dots come out evenly spread with no grid, no clumps and no worms.

Good for pen plotters, lasers and animation.

Try Blue noise on your image → How blue noise dithering works

How it decides

One comparison per pixel, like Bayer, but the mask has no low-frequency structure. On a plotter it looks like careful hand stippling; on a laser it tolerates burn spread.

Blue noise dithering applied to a photo of a lion
Slide to compare. A 0.7 mm cell on A5 with perceptual tone: 28,583 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.

Blue noise

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.