Which colours does it match to?

Every pattern is matched against 454 real DMC floss shades. Colours are compared in the CIE-Lab perceptual colour space rather than raw RGB, so the chart stays closer to the original than simpler converters.

Free Diamond Painting Pattern Generator – Photo to DMC Drill Chart

Private by design — your photo is processed on your device and never uploaded.

Click or drop an image here (JPG · PNG · WebP)

Try a sample:

Pattern settings

Image adjustments

Brightness 0

Contrast 0

Saturation 0

Background removal

Click the preview image to pick the background color. Similar pixels become empty cells and are excluded from the material list.

Canvas size (wide)

Max colors: 30

Dithering (smoother gradients)

Confetti reduction

Generating…

Pattern preview

Zoom

Symbols Grid lines Hover to highlight a color

PNG export

How the photo-to-diamond-painting converter works

This tool converts any photo into a square-gridded diamond painting pattern in three steps. First, your image is downsampled to the canvas size you choose — every grid square becomes one drill. Second, the colors are reduced to a limited palette and matched against real DMC thread colors (454 shades) using CIE-Lab perceptual color distance, the same approach professional charting software uses. Third, every cell gets a symbol so you can read the chart on paper, and each DMC color is counted so you know exactly how many drills of every shade you need before you start.

What you get

A color chart with grid lines and bold guides every 10 cells
A symbol chart for easy reading on large canvases
A complete material list: DMC codes, color names, and drill counts per color
Printable output that works with any standard diamond painting canvas

Choosing your settings

Canvas size: 20–30 drills suits keychains and cards; 40–60 is the sweet spot for pets and portraits; 80–100 produces detailed artwork but takes far longer to finish. Max colors: fewer colors (10–20) give a clean cartoon look; 30+ preserves photographic detail. Dithering trades flat areas for a textured mix that renders gradients much better on real drills.

Tips for the best pattern

Crop tightly to your subject before uploading — backgrounds waste drills
High-contrast photos convert more cleanly than flat, dim shots
For portraits, 50+ drills wide and 25–35 colors usually looks right
Buy drills by DMC code from the material list — counts include a little slack because of dithering, but rounding up 10% is a safe rule

Frequently asked questions

Is my photo uploaded anywhere?

No. All image processing runs locally in your browser with HTML5 Canvas. Nothing is sent to any server — you can even use this tool offline once the page is loaded.

Is it really free?

Yes, no sign-up, no watermark, no limits. The tool is supported by the site it lives on.

Can I sell patterns I make here?

The chart you generate is yours — use it for personal projects, gifts, or products. Just make sure you own the rights to the source photo.