Reduce

Image → Binary

Convert any image to binary (0s and 1s) for free. Upload a photo or screenshot and get a black-and-white binary grid at a resolution you choose, up to 2048x2048, with dithering for photos, copy, and download. Handy for teaching how images are actually stored as bits, for retro/glitch art, or just to see a photo reduced to its simplest possible form. Runs entirely in your browser.

Runs client-side, the same as every tool here. See the full catalog for everything else.

Reduces a photo to black-and-white bits at whatever resolution you set.

Drop an image, click to browse, or paste a screenshot.
Drag Width/Height to set resolution, and Threshold to set the black/white cutoff.
If “Increase resolution & contrast for clarity” lights up, click it.
Copy, download, or save the result.

Drop an image, click to browse,
or paste a screenshot (⌘V)

ThresholdDither (for photos)

Width (pixels, 255 by default, type up to 2048 directly)

Height (pixels, 255 by default, type up to 2048 directly)

Threshold (luminance cut between 0 and 255)

128

Invert (swap so the background is black and the shape is white, or the reverse)

No image loaded yet

Grid preview

The reduction will appear here.

Binary field

Nothing to show yet.

Recently saved.

kept only for this browser tab, sign in to save permanently

Nothing saved yet. Reduce an image above, then press Save to keep it here.