1-bit image converter

Turn any photo into true 1-bit black and white — with real dithering instead of a hard threshold, so tones and detail survive.

Atkinson dithering example (1-bit, Great Wave)
Atkinson
Blue noise (void-and-cluster) dithering example (1-bit, Great Wave)
Blue noise (void-and-cluster)
Halftone screen dithering example (1-bit, Great Wave)
Halftone screen

Try it on your image ↓

What is a 1-bit image?

A 1-bit image stores one bit per pixel, so every pixel is pure black or pure white; dithering arranges those pixels so that the eye perceives grey tones.

How to do it

Turn any photo into true 1-bit black and white — with real dithering instead of a hard threshold, so tones and detail survive.

  1. Open or drop an image (a sample is preloaded).
  2. The preset above is already applied. Adjust contrast, palette and strength to taste.
  3. Compare with other algorithms from the Algorithm menu.
  4. Download PNG (free up to 1000px) or SVG/GIF with Pro.

Frequently asked questions

Why not just threshold to black and white?

A hard threshold turns everything above 50% white and below black, losing all midtones. Dithering keeps the impression of greys by varying the density of black pixels.

Which algorithm is best for 1-bit?

Atkinson for a crisp graphic look, Floyd–Steinberg or variable-coefficient for the most faithful tones, blue noise for organic texture, and halftone for print.

Can I get a 1-bit SVG for laser engraving or a plotter?

Yes, with Pro: SVG export merges runs of black pixels into compact paths.

What is a 1-bit image used for?

E-paper displays, thermal printers, laser engraving, screen printing, Playdate games, retro Mac art and small icons.

Is my image uploaded?

No. The dither runs locally in your browser; nothing is sent to a server.

Is it free?

Yes. Every algorithm previews free and PNG exports up to 1000px are free with no watermark or signup. Pro ($5 for 30 days, USDC) adds print-resolution exports, SVG, GIF and video.