Pattern drafting, reimagined
A modern, browser-based system built for sewing enthusiasts and professionals. No plugins, no desktop installation — everything runs in your browser.
Para-metric
Every dimension is computed from formulas and body measurements. Change one value, the entire pattern adapts.
Para-llel
Collaborative from the ground up — patterns are shared, discussed, and improved together.
Para-mount
Professional-grade output with rigorous testing, open formats, and modern engineering.
What you'll be able to do
Define every point, line, and curve with formulas referencing body measurements.
Calibrate and cut patterns directly on fabric at true 1:1 scale. No printing.
Export to SVG, PDF, DXF, and HP-GL for home printers, plotters, and industrial cutters.
Share patterns, measurement sets, and pattern libraries with other users.
Where we're headed
ParaPattern is being built incrementally — amateur-first, then professional-complete. Here's the story of what's coming.
Start with straight lines
It begins simply. You open your browser, key in a handful of body measurements, and draft your first pattern — straight seams, computed dimensions, automatic seam allowance. Every line is a formula, not a freehand stroke. Export to SVG and you're cutting fabric the same afternoon.
Then curves arrive
Bézier splines and circular arcs bring real garments to life — necklines that flow, armholes that fit, hems that curve exactly where they should. Control points are parametric too: change a shoulder width and the armscye redraws itself.
Project it, cut it
Calibrate your projector, lay the fabric on the table, and cut at true 1:1 scale — no printing, no taping, no wasted paper. The browser drives the projection directly, with calibration tools built in.
The full professional toolkit
Over thirty geometric tools — intersections, perpendiculars, tangent points, true darts, mirrors, rotations. Grading across size ranges. Automatic nesting for fabric-efficient layouts. Export to SVG, PDF, DXF, and HP-GL for home printers, plotters, and industrial cutters.
Share and build together
Patterns are meant to be shared. Publish measurement sets, build pattern libraries, collaborate with other makers. Every pattern stays in open formats — SVG, PDF, DXF — so your work is never locked in.
We're looking for people like you
Whether you sew, design, code, or care about open-source — there's a place for you on this project.
Sewing Enthusiasts
You draft or modify patterns regularly and want a better digital tool.
Projector Sewists
Help us design the ideal projector cutting workflow.
Pattern Designers
Advise on professional tools and workflows for parametric patterns.
Developers
TypeScript, React, Canvas2D, computational geometry — there's plenty to build.
UX Designers
Make complex parametric tooling approachable and delightful.
Open-Source Contributors
Passionate about open formats and community-driven software.
About the project
Built From Scratch
A modern reimplementation, designed and built as a browser-native application from the ground up — driven entirely by documentation and design specifications.
Made for Makers
Built by hobbyists, for hobbyists — and open-source to the core. Whether you sew your first skirt or draft production patterns, this tool grows with you.
Open Formats
All exports use standard open formats — SVG, PDF, DXF — so your patterns are never locked in.
Contact: team@parapattern.art