Crochet Pattern Builder

Design custom projects row-by-row or round-by-round.

Patterns are produced by deterministic algorithms and machine-validated for stitch-count accuracy — never written by a language model.

Choose how it's worked

Available nowRow by rowFlat panels, cardigans, and structured bags — worked in rows and turned. Set a foundation, then stack stitch-pattern bands, hand-edited rows, and pixel designs in the order you crochet them.Start a flat pattern

Row-by-row composer

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This pattern works!Foundation: Ch 77

Top — Row 10, worked last

Bottom — Row 1, worked first off the chain

24 × 8.3 in10 rows

Foundation

24 cells → Ch 77 · 3 × 24 + 5 (space-first)

This pattern starts in filet, so its foundation is set by width in cells — 3 chains per cell plus the starting chains. Chains snap to whole filet cells.

Yarn

Hook H-8 (5 mm)

Custom gauge

Stitches counted

over width

Rows counted

over height

Made a swatch? Enter your blocks and rows over a measured piece — your gauge overrides the yarn default, without moving the chain count.

Your piece

Sections in the order you crochet them — the first is Row 1, the bottom of the fabric.

Band 1 worked firstRows 1–10
Fabric for band 1
rows

Crochet Pattern Builder

Design custom projects row-by-row or round-by-round.

Choose how it's worked

Row-by-row composer

Add to your piece

Foundation

Your piece

Save as part

Add to your piece

Foundation

Your piece

Save as part