Dither an image to black and white locally - the Floyd-Steinberg retro look, format preserved. No upload.
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Dithering turns a greyscale image into pure black and white dots while preserving the impression of shades, the way old newspapers and 1-bit displays did. This tool uses Floyd-Steinberg error diffusion: for each pixel it picks black or white, then spreads the rounding error to neighbouring pixels, so a grey area becomes a fine pattern of dots that reads as that grey from a distance.
The result is a crisp, high-contrast, retro one-bit image - great for a vintage print look, e-ink style graphics, stylised avatars or stencils. The output keeps your original format and dimensions; for the crispest result use PNG, since saving the dotted pattern as JPEG can soften it slightly through compression.
Everything runs entirely locally in your browser on a canvas (no upload, even offline) - your image never leaves your device. Dithering first converts the image to greyscale, then diffuses the error, so colour is discarded by design. Animated images are flattened to a single frame.
| Input formats | JPG, JPEG, PNG, WEBP |
|---|---|
| Output format | PNG |
| Batch processing | Yes |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Dithers an image to one-bit black and white with Floyd-Steinberg error diffusion (greyscale first, then error spread to neighbouring pixels). The original format and dimensions are preserved; PNG keeps the dotted pattern crisp, JPEG may soften it. Colour is discarded. Animated inputs are reduced to a single frame.
No. The dithering runs entirely locally in the browser on a canvas - even offline. Your image never leaves your device.
An error-diffusion method: each pixel is set to black or white and the rounding error is spread to neighbouring pixels, so patterns of dots reproduce the impression of grey shades.
PNG keeps the one-bit dot pattern crisp. JPEG can soften it through compression, so prefer PNG for dithered images.
No. The image is converted to greyscale before dithering, so the result is pure black and white.