The design app for rigid heddle weavers

The design app for
rigid heddle weavers

LoomSketch is a free, browser-based drafting tool built for rigid heddle weavers. No downloads, no account required — just open it and start planning your next project. Sketch out your color sequences, experiment with symmetry, and see your pattern come together before you ever wind a warp. Whether you're a new weaver figuring out your first stripe sequence or an experienced one who just wants a quick visual reference, LoomSketch keeps it simple and gets out of your way.

About LoomSketch

Mirror your pattern horizontally, vertically, or both at once — great for building balanced repeats without the math.

Symmetry

Make threads thicker or thinner to match your yarn weight and see a more accurate preview of your finished cloth.

Adjustable Thread Size

Click or drag to place color — it works the way you'd expect, so there's no learning curve.

Drawing

Pick from a built-in palette or dial in your own custom colors to match your actual yarn stash.

Color

Turn on evenly spaced marker lines to keep your eye oriented as your pattern grows.

Grid Guides

Drop in a photo for color reference or use it as a tracing guide underneath your draft.

Importing Photos

Set how many warp and weft threads your draft contains — small swatches to full project layouts.

Grid Size

See how your pattern tiles across a wider cloth so you can catch awkward transitions before you're at the loom.

Repeat Tile

Flood-fill the canvase with one color in a single click instead of painting thread by thread.

Fill

Clear individual threads or whole sections when you want to rethink part of your design.

Erase

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