usefulweb.site Threadsmith Digitizer

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Threadsmith Digitizer

Turn shapes, SVG paths, text or a whole project into embroidery stitches with stats and preview.

mm
mm

SVG path syntax in millimetres (y down, 0,0 = hoop centre). Closed paths (Z) become fills, open paths become lines.

paths, rect, circle, ellipse, line, polyline, polygon and transforms are imported; text, images and gradients are skipped with a warning.

mm

Optional. Default: the SVG’s own physical size (px at 96 dpi).

A–Z, a–z, 0–9 and . , ! ? - _ ' " : ; ( ) / & + # * =

mm

A .threadsmith.json project (see the app’s project schema).

°
mm
mm
mm
mm

#rrggbb or a built-in thread name such as ruby, emerald, gold, navy.

stitches/min

Adds result.stitchList ([x, y, type] in mm) for chaining into threadsmith-stitch-file.

Try an example: 40 × 30 mm oval, automatic tatami with underlay · Satin column along a curve · Name in single-line satin lettering · SVG badge (circle + square) · Template project: botanical leaf

How it works

Digitizes vector artwork into machine embroidery: running, bean, satin (with pull compensation, auto split and short stitches), tatami fill with stagger and graded density, contour fill and motif runs, plus underlay. Returns stitch counts, trims, colour changes, thread and bobbin estimates, sewing time, hoop fit, a density check and a thread-look SVG preview — the same engine as the Threadsmith app.

  • Shapes are flattened to polygons (Bézier curves within 0.04 mm); closed shapes are regions (even-odd, holes allowed), open paths are lines.
  • Tatami: scanlines at the fill angle every row-spacing; intervals are split into blocks that can be sewn back and forth, ordered nearest-first, and penetrations sit on a staggered grid (1/3 offset by default) so no visible columns form.
  • Satin: zig-zag between the edges every density step (rows perpendicular to the shape’s principal axis); columns along lines measure spacing on the outer edge and shorten every other inner stitch on tight curves; stitches longer than the max width are split with interleaved penetrations.
  • Contour fill and edge-walk underlay use an exact Euclidean distance transform of the rasterised shape and marching-squares iso-lines, so insets stay valid for concave shapes and holes.
  • Sequencing: objects grouped by colour (first appearance) and visited nearest-first; gaps up to 1.2 mm are sewn, gaps below the trim distance are jumped, longer gaps get tie-off, trim, jump and tie-in.
  • Thread estimate = sewn length + 0.8 mm take-up per penetration + 5 % waste; bobbin ≈ ⅓ of the sewn length; time = stitches ÷ speed + 4 s per trim + 20 s per colour change.

Estimates assume average fabric and settings; always test-stitch on the real fabric and stabiliser. Thread names are generic colours, not brand shade numbers.

Sources

For scripts and AI agents

  • JSON API: POST https://threadsmithdigitize.usefulweb.site/api/v1/calculate (same calculation as this page)
  • Interface description: OpenAPI 3.1 · AI guide: llms.txt
  • MCP server (Streamable HTTP): https://threadsmithdigitize.usefulweb.site/mcp · tool name threadsmith_digitize
Example request
curl -s -X POST https://threadsmithdigitize.usefulweb.site/api/v1/calculate \
  -H 'content-type: application/json' \
  -d '{"source":"shape","shape":"ellipse","widthMm":40,"heightMm":30,"color":"ruby"}'

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