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SPECIFICTION
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Seamly2D

seamly.io

Free plan WindowsmacOSLinux
Visit seamly.io
Spec score 7.4 #15 of 30 in Fashion Design Software

What it is

Seamly2D is free, open-source fashion design software for creating garment patterns on Windows, Linux, and MacOS. Its pattern workflow supports adapting earlier designs and working with size charts, made-to-measure data, and converted body scans. The site lists apparel, costumes, athletic wear, pet gear, outdoor products, and upholstery as possible applications. Seamly describes a process extending from design through manufacturing for physical and digital products, and says its software integrates 2D, 3D, and Mixed Reality. A beta process described for 3DLOOK MOBILE TAILOR measurements converts CSV files into Seamly measurement files by email. The download process asks for a name, email, operating system, and intended use before emailing a download link. The download page says Seamly Systems does not sell or share the personal information it holds. A user forum is available for software discussion. Seamly2D includes 2D pattern making and size grading, with SVG listed as an export format.

Spec sheet

Purpose
Seamly2D is open-source fashion design software for creating garment patterns.Read 3 Oct 2026 · seamly.io
Support
The site links to a Seamly user forum described as a discussion forum for Seamly software.Read 3 Oct 2026 · forum.seamly.io
3D and mixed reality
The software page says Seamly integrates 2D, 3D, and Mixed Reality.Read 3 Oct 2026 · seamly.io
Body scan integration
A Seamly article describes a beta process for converting 3DLOOK MOBILE TAILOR measurement CSV files into Seamly measurement files by email.Read 3 Oct 2026 · seamly.io
Design workflow
The software page describes a workflow spanning design through manufacturing for physical and digital products.Read 3 Oct 2026 · seamly.io
Download process
The download page asks users for their name, email, operating system, and intended use, then says it will email a download link.Read 3 Oct 2026 · seamly.io
Industries
The site lists apparel, costumes, athletic wear, pet gear, outdoor products, and upholstery as possible uses.Read 3 Oct 2026 · seamly.io
Maker and origin
The About page names Susan Spencer as the founder and says Seamly 2D grew from her effort to address poor garment fit.Read 3 Oct 2026 · seamly.io
Pattern design
The site says Seamly helps users create patterns quickly and easily and adapt previous designs to current needs.Read 3 Oct 2026 · seamly.io
Privacy statement
The download page says Seamly Systems does not sell or share personal information it holds.Read 3 Oct 2026 · seamly.io
Sizing
The site says designers can use size charts, made-to-measure data, and converted body scans.Read 3 Oct 2026 · seamly.io
Supported desktop systems
The home page offers downloads for Windows, Linux, and MacOS.Read 3 Oct 2026 · seamly.io

Plans and prices

Seamly2D Free Free and open source Read 3 Oct 2026 · seamly.io

Every Seamly2D plan and price →

Strong points and limits

Strong points

  • Free and open source
  • Available for Windows, Linux, and MacOS
  • Supports 2D pattern making and size grading
  • SVG export
  • Works with made-to-measure data

Limits

  • Download link is emailed after providing personal details
  • Body-scan conversion is described as a beta process

Who it suits

Seamly2D suits fashion and product designers making garment patterns who work with size charts, custom measurements, or converted body scans. Its listed applications include apparel, costumes, athletic wear, pet gear, outdoor products, and upholstery.

Verdict

Seamly2D offers a free pattern-making workflow with size grading and SVG export across three desktop systems. Note the email-based download process and beta status of the described body-scan conversion.

Where Specifiction places it

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