Convert Line/Arc Outline DAT to sew

Download and install the latest version of Filestar.
Right click on one or more Dat file(s) on your desktop and select Convert with Filestar.
Type convert to sew in the search box.
Press Convert.

Or let an AI agent do it: filestarcli -i file.dat -c "convert to sew" (how).

Let your AI agent convert Line/Arc Outline DAT to SEW

Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Or add it in one click:

Claude Code:

claude mcp add filestar -- npx -y [email protected] mcp

Then ask your agent:

“Convert the Line/Arc Outline DAT files in my Downloads folder to SEW”

Or run it yourself:

filestarcli -i file.dat -c "convert to sew"

Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.

Can my AI agent convert Line/Arc Outline DAT to SEW?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.dat -c "convert to sew" on your computer, so your files stay on it.

Using Filestar With AI Agents · Download SKILL.md

What is the difference between Line/Arc Outline DAT and .sew?

Name: Line/Arc Outline DAT; Janome (New Home) Sewing Machine Stitch File
Extension: .dat; .sew
Format: Text
Category: Embroidery; Embroidery
Developer: Janome
Description: A text outline format used by industrial sewing machines. Each line holds nine integers: a flag (0 = line, 1 = arc, -1 = end record), a start point, an end point and, for arcs, a centre point and a rotation direction, with coordinates in hundredths of a millimetre and every record terminated by LF CR.; Sew files are binary files that are used to save embroidery designs created with Janome (New Home) Sewing Machine software. The files contain the instructions for the sewing machine to stitch the embroidery pattern onto fabric.
MIME Type: text/plain; application/x-sew
Sample: sample.sew

Embroidery

Machines that use SEW: Janome · Elna

What a conversion keeps

Stitches: Every stitch is kept at its exact position. Nothing is re-digitised.
Colours: Kept when the target stores them. DST stores no colours, only where each colour changes, so your machine asks for the threads.
Trims, jumps and stops: Kept, and written the way the target machine expects them.
Objects and lettering: Design programs keep shapes and text as objects. A machine file only holds stitches, so objects become stitches.

All Embroidery Formats and Machines

Convert Line/Arc Outline DAT To Sew Today

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