DST File Format

Origin: Tajima

Tajima Industries is a Japanese manufacturer that has dominated the commercial embroidery machine market since the late 1970s. When they built their own machine-control software, they created a stitch file format to go with it: .DST, short for “Data Stitch Tajima.” The format launched alongside their commercial multi-head machines and quickly became the file every Tajima customer used in production.

Because Tajima sold so many machines worldwide, and because customers wanted to share files between shops, every other manufacturer eventually built DST read support into their machines and software. Today, DST is the closest thing the embroidery world has to a universal language.

Why DST Became Universal

DST won the standard war for two reasons. First, market share: Tajima machines were everywhere in commercial production, so files in their native format were everywhere too. Second, simplicity: DST is a minimalist format. It stores X-Y coordinates, color change markers, and jump/trim commands - and nothing else. No embedded colors, no preview thumbnails, no metadata. That stripped-down design makes it trivial for any other manufacturer to add DST read support to their machines.

The opposite of DST is .EMB (Wilcom) - rich in metadata, full of editable objects, useless outside Wilcom software. DST is the JPG of the embroidery world. EMB is the PSD.

Machine Compatibility

DST runs natively on virtually every commercial embroidery machine in production today, including: Tajima (all series), Barudan, Brother PR-series and entrepreneur commercial, Melco Amaya and Bravo lines, Happy Japan, ZSK, and SWF. Many home machines also read DST with caveats around hoop size and stitch count - including Brother home machines, Janome home machines, and most modern Husqvarna Viking.

If you do not know what machine your embroidery job will run on, ask for DST. It is the safe default.

What DST Does Not Contain

DST does not embed thread color names or codes. When the machine reaches a color change in the file, it stops, and the operator (or a notes sheet) determines what thread goes in next. This is fine in commercial production where each job has a digitizer's color sheet, but it can confuse first-time home users who expect the colors to “just be there.”

DST also does not contain a design preview thumbnail or editable stitch objects. It is purely the executed stitch list. To edit, you would need the original EMB or equivalent source, or you would convert DST to objects using software like Wilcom's reverse-engineering tools (which is a lossy process).

When to Use DST

Use DST when: you are running on a commercial machine, you do not know what machine the file will run on, you are sending the file to another shop or vendor, you want maximum cross-compatibility, or you want the smallest possible file size for storage.

Use a different format when you are running on a specific home machine that benefits from embedded colors and preview - request PES, JEF, or VP3 instead, as appropriate.

How to Open and View DST Files

Free DST viewers include Wilcom TrueSizer (web and desktop) and Embird Express. Both display the design with assumed colors, list the stitch count, and show dimensions. For more capability, paid options include Brother PE-Design, Embird Studio, Hatch Embroidery, and Wilcom EmbroideryStudio.

You can also use online converters to transform DST into PES, JEF, VP3, or other formats - useful when you receive a DST from one digitizer and your machine needs something else.

FAQ