Beautiful garments start with
precise lines.

A professional Illustrator extension tailored for patternmaking.
Automated seam allowances, precise Bezier curve measurement, and tech pack data extraction—all integrated into one powerful panel.

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Philosophy

ELiminating manual ambiguity,
bringing digital precision to patternmaking.

01

Mathematical Approach

Seam allowance generation and measurement use a unique algorithm that splits and analyzes Bezier curves in 100 steps. Even complex armholes are processed with absolute precision.

02

Reflecting the Patternmaker's Mind

Mirroring sharp corners, "V-shaped" hem processing, and more. We automate specific garment construction "rules" that generic offset tools simply can't handle.

03

Tech Pack Support

Efficiency doesn't end with drawing. Batch-analyze perimeter and area for multiple parts, instantly generating data tables for technical specifications on your document.

Features

Four Modules for Unmatched Efficiency

Module 01

Advanced "Seam Allowance" Automation

Simply enter values and click. From basic offsets to essential patternmaking features, we have it covered.

  • Sharp Corner Mirroring: Automatically handles sharp corners to ensure seam allowances don't "poke out."
  • Special "Hem" Mode: Select two points on a hem with the direct selection tool to create tapered seam allowances for folding instantly.
  • Automatic Corner Notches: Automatically draws 5mm notch lines at the corners of seam allowances.
SeamPro Allowance
All (Paths)
Hem Only
Base Allowance (mm):
Direction:
SeamPro Measurement & Ease
Measure
Notch
Analysis
[Ease Amount] 2.35 mm
L1: 152.00 / L2: 149.65
Module 02

Bezier Curve
"Smart Measurement & Ease Calculation"

Derived curve path length with high precision (100-step calculation), optimized for patternmaking workflows.

  • Ease Calculation: Select two paths to instantly calculate the difference (ease amount).
  • Segment Measurement: Select two anchor points to measure the exact length between them.
  • Direct Labels: Place measurement results as text directly on the artboard with one click. No more copy-pasting.
Module 03

Versatile "Registration Notches" & "Tech Pack Analysis"

Automating perpendicular calculations for curves, with data output features for industrial tech packs.

  • Multi-distance & Equal Division: Specify multiple positions (e.g., "50mm and 100mm") or "divide into 3 parts." Supports reverse direction.
  • 3 Notch Styles: Beyond standard lines, draw "V-style" or "U-style" notches for easier fabric cutting.
  • Component Analysis Output: Automatically generate a tab-separated table of "Name, Perimeter, Width, Height, and Area (m²)" for selected parts.
Add Notch
Dist:
Dir:
Type:
Divide:
Part Analysis Table

List dimensions for multiple parts

App summary

App name
SeamPro
What it does
An Illustrator extension that speeds up pattern-making workflows.
Supported OS
macOS / Windows, Illustrator CC 2019 or later
Main uses
Seam allowances, notches, measurements, and part analysis
Pricing
One-time license. See the License section for current page pricing.
Data handling
Runs as .jsx extension files inside Illustrator.
Official support
SeamPro Support

Who it helps

SeamPro is for pattern makers and creators who build patterns in Illustrator.

It makes repeated pattern-making tasks such as seam allowances, notches, measurements, and part analysis faster and easier to keep consistent.

Apparel pattern makers

Create seam allowances and notches inside Illustrator while reducing repetitive manual adjustments.

Bag and accessory creators

Check distances and manage parts more easily, even in designs with curves and multiple components.

Production teams and educators

Standardize pattern-making steps and make Illustrator-based workflows easier to share.

Use cases

Common ways to use SeamPro

SeamPro supports pattern-making work in Illustrator, including seam allowance creation, notch placement, part measurement, and list generation.

Create seam allowances in Illustrator

Add seam allowances along pattern lines and reduce manual offset work during pattern revisions.

Add notches and alignment marks faster

Place notches and marks for apparel, bags, and small goods directly inside Illustrator.

Check part lists and measurements

Measure pattern distances and generate part lists to support review, production notes, and team sharing.

Demonstration

Intuitive Operation, Instant Calculation.

Play Demo Video

Official facts

FAQ

Frequently Asked Questions

SeamPro is an Adobe Illustrator extension for apparel and bag pattern making, built for Adobe Illustrator CC 2019 and later on Mac and Windows.

Q.

Which Illustrator versions are supported?

A. SeamPro supports Adobe Illustrator CC 2019 and later on Mac and Windows. Operation on older versions such as CS6 is not guaranteed.

Q.

Is installation difficult?

A. No, installation is not difficult. Place the downloaded .jsx files into Illustrator's Scripts folder; a detailed PDF manual is included with purchase.

Q.

Can I use it on multiple PCs?

A. Yes, a single license allows installation on up to two PCs used by the purchaser. For example, you can use it on an atelier desktop and a mobile laptop.

License

Permanent License / No Subscription

SeamPro Professional

Illustrator CC 2019+ / Mac & Windows

One-time payment
$59 $29

Special Launch Price (50% OFF!)

Currently available for $29 for early adopters (Regular price $59).
We would appreciate your feedback!

SeamPro Extension Modules (.jsx) Included
Commercial Use License Included
Free Minor Updates Included
Installation & Operation Manual (PDF) Included
Coming Soon!

*Currently unavailable before release.

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