Generate Mosaic Crochet
Patterns from Images

Start with a bold picture that can survive reduction to two colors. Logos, silhouettes, geometric motifs, and simple line art work better than photographs with gradients or fine facial detail. Upload the image, set the palette to two contrasting yarn colors, increase contrast, and use confetti reduction until the main shapes are clear.

Choose Mosaic mode and ArtPatt compiles the image for one defined method: right-side-only overlay mosaic crochet in US terms. It adds setup rows, alternates Color A and Color B, marks mosaic double crochet with X, and writes each row as runs of edge sc, BLO sc, and mdc.

If two consecutive rows would require mdc in the same column, the later stitch would have no unused front loop to anchor into. The compiler resolves those conflicts with the fewest possible changes and tells you how many image cells changed. Always crochet a swatch before committing to a blanket; the generator does not produce inset mosaic or other mosaic variants.

Throw blanket (60–80 motif cells wide): Use a bold geometric pattern in two high-contrast colors. The generated row list alternates colors on every row and includes one edge sc at each side. Check the in-app yarn estimate, then make a swatch because mdc height and your tension affect both size and consumption.

Coaster set (20×20 stitches): Perfect beginner mosaic project. Simple diamond or star pattern. Takes 30-45 minutes per coaster. Use cotton cord for heat resistance. Makes great gifts.

Wall hanging (40×60 stitches): Mounted on a dowel rod. Geometric mandala or southwestern pattern. Add fringe at bottom for extra length. Frame with a simple wood rod at top and bottom.

Overlay mosaic is worked from the right side only, one color per row, and you never turn the piece. Chain your foundation in Color A and work a setup row of single crochet. Cut the yarn, fasten off, and rejoin Color B at the same edge you started from — that rejoin at the beginning of every row is what keeps the right side facing you and what makes the technique look far harder than it is.

Each row after that is two stitches in combination. A blank cell on the chart is a back-loop-only single crochet: you work into the back loop and deliberately leave the front loop unused. An X cell is a mosaic double crochet, worked down into that unused front loop two rows below, in the row that shares its color. Because the taller stitch reaches past the intervening row, the active color covers the row underneath and the motif appears to sit on top of the fabric rather than being knitted into it.

Two habits save most beginners' first project. Work one edge single crochet at each side of every row — the chart counts motif cells only, and those edge stitches keep the sides from pulling in. And swatch before you commit: mosaic double crochet is taller than single crochet, so row gauge is what decides the finished length, and your tension on the mdc pull-up is the variable no chart can predict.

A mosaic crochet chart is a grid where every cell is one of two things, so the printable chart carries X marks for mosaic double crochet and blank cells for back-loop single crochet, with row numbers down the side and the active color named for each row. Because you never turn, the row numbers always read in the same direction — there is no odd/even reversal to track, which is the detail that makes an overlay mosaic chart simpler to follow than a two-color knitting chart.

The printable PDF pairs that X chart with the same rows written out in working order: edge sc, then runs of BLO sc and mdc as counts rather than cell-by-cell. Most people follow the written rows for the body of a row and glance at the chart to check where they are in the motif. The export also lists the per-color yarn estimate, so a blanket-sized chart tells you how much of Color A and Color B to buy before the first foundation chain.