Why a JPG and a DST are completely different files
A JPG stores colour values for millions of tiny squares (pixels). It has no idea where an outline starts, which shape sits on top, or how big the design will be on a shirt.
A DST (the Tajima format read by most commercial and multi-head machines) stores none of that colour detail. It is a list of needle movements: stitch here, jump there, trim, change colour, carry on. Every stitch has a direction and a length, and they are laid down in a set order.
So going from JPG to DST isn't a format change. Someone, or something, has to decide how every part of the image will be built from thread. That decision-making is what embroidery digitizing is.
What auto-digitizing and free converters get wrong
Online "JPG to DST converters" and the auto-digitize button in embroidery software trace the colour areas in your image and fill them with stitches. That can look fine on screen, but the machine often tells a different story:
- Wrong stitch types: thin borders filled instead of satin-stitched, so edges look ragged
- No proper underlay: the top stitches sink into the fabric or shift, leaving gaps
- Density mistakes: too dense and the fabric puckers or the needle breaks; too light and the garment shows through
- No pull compensation: thread pulls shapes narrower, so outlines no longer line up with fills
- Small text turns into a blob: letters under about 0.25 in (6 mm) tall need special handling
- Messy sequencing: extra jumps, trims and colour changes slow production down
Those problems cost money: wasted garments, broken thread, and a client who isn't happy with the result. That's why most embroidery shops prefer files that were digitized by hand. If you'd like to try it yourself first, the logo to embroidery file guide walks through the free Ink/Stitch method and where it tends to fail.
How to create a DST file (3 ways)
Whichever route you pick, a DST is always made, not converted: someone or something has to decide the stitch type, angle, density and order for every shape. The three routes differ in who makes those decisions.
1. Digitize it yourself in free software
Ink/Stitch is a free, open-source embroidery extension for the free vector program Inkscape, and it can save designs as DST, PES, EXP, JEF and other formats. You place or trace your logo, turn each shape into a fill, satin or running stitch, set the parameters and export. It costs nothing, but expect a real learning curve: underlay, pull compensation and stitch order are all settings you have to understand and test on fabric. It's a good choice for hobby projects and for learning how embroidery works.
2. Use auto-digitizing in embroidery software
Most paid embroidery programs, and some bundled with home machines, have an auto-digitize button that traces the colours in your image and fills them with stitches. It is quick and works best on very simple, bold artwork with a few flat colours. Fine borders, small lettering, gradients and photos are where it usually breaks down, and you still need to clean up the result before it sews well. Many of these programs offer a free trial, so you can test one before buying.
3. Have it hand digitized
A digitizer redraws the design by hand in professional software and builds the stitches for your size, fabric and machine. This is what embroidery shops use for logos that go on paid orders, because the file is planned to sew cleanly the first time. At StitchNova a left-chest or cap logo starts at $10, delivered as DST plus any other format you need, with the editable EMB, stitch count and colour sheet. New clients can get their first design digitized free (flat left chest or cap logo up to 4 in).
| Method | Software cost | Your time and skill | Best for |
|---|---|---|---|
| Free software (Ink/Stitch) | Free | High: learn stitch types and settings, test sew | Hobby projects, learning, simple shapes |
| Auto-digitizing | Paid license or subscription; free trials common | Medium: fast to create, cleanup needed | Very simple bold logos, quick drafts |
| Hand digitizing service | None, you pay per design | Low: send the artwork, size and fabric | Logos for customers, caps, small text, production runs |
Already have the design in another embroidery format, such as PES? That's a different job: stitch files can be exported between formats in embroidery software. See file conversion & fixes and the file formats guide.
How a JPG is turned into a DST, step by step
This is the process I follow for every logo, using Wilcom EmbroideryStudio.
1. Check the artwork and the job
Before any stitches go down, I confirm three things: the finished size (for example 3.5 in wide for a left chest), the fabric or item (polo, T-shirt, fleece, towel or cap) and the machine format. A design for a structured cap is built very differently from the same logo on a T-shirt.
2. Simplify for thread
Thread can't reproduce gradients, hairline strokes or tiny gaps. Fine details are thickened or removed, gradients become solid colour blocks, and text is checked for legibility at the real size.
3. Redraw every shape as stitch objects
Each part of the logo is redrawn by hand: satin stitches for borders, columns and lettering, fill (tatami) stitches for larger areas, and run stitches for fine lines and details. Stitch angles are set so fills catch the light well and don't distort the fabric.
4. Add underlay, density and pull compensation
Underlay is a foundation layer that stabilises the fabric and lifts the top stitches. Density is set for the fabric, lighter on T-shirts, fuller on twill and caps. Pull compensation widens shapes slightly so they finish at the right size after the thread pulls in.
5. Plan the stitch order
The design is sequenced to sew from the centre outward and from back to front, with as few jumps, trims and colour changes as possible. Good sequencing is what makes a file run smoothly on a busy multi-head machine.
6. Export the DST and check it
The finished design is exported as DST (plus any other format you need) and checked with a stitch simulation. You receive the stitch file, the editable EMB master, a stitch count, a colour sheet and a preview image.
DST troubleshooting: why a DST file sews badly
When a DST misbehaves on the machine, the cause is either the file or the machine setup (tension, needle, stabilizer, hooping). This table helps you tell which, and what to do about it.
| What you see | Likely cause | What fixes it |
|---|---|---|
| Thread keeps breaking or shredding | Density too high, very short stitches or too many layers on top of each other. Also check needle size, thread path and tension. | Re-digitize the dense areas with lighter density and fewer stacked layers; change the needle and re-thread first to rule out the machine. |
| Gaps between outlines and fills | No pull compensation, or no underlay holding the fabric. Loose hooping makes it worse. | Add pull compensation and proper underlay in the file, and hoop firmly with the right stabilizer. |
| Fabric puckers around the design | Design too dense for the fabric, missing underlay, or stabilizer too light for a stretchy or thin garment. | Lower density for that fabric, use a suitable underlay, and use a heavier or cut-away stabilizer on knits. |
| Wrong colours on the machine | A DST stores colour changes, not thread colours, so the machine shows its own default colours. | Assign each needle from the colour sheet that should come with the file. Nothing in the file needs fixing. |
| "Design too big" or hoop error | The design was built larger than your hoop or sewing field, or its centre point is off. | Use a bigger hoop, or have the design resized from the editable EMB or digitized at the right size. Don't shrink it much on the machine. |
| Small text turns into a blob | Letters too small for thread (under about 0.25 in / 6 mm tall) or filled instead of satin-stitched. | Rebuild the lettering as satin columns, enlarge the text or simplify the wording. |
| Lots of trims, jumps and stops | Poor sequencing, common in auto-digitized files. | Re-sequence the design so it sews by colour and area with fewer jumps and trims. |
| Machine won't open the file | Wrong format for the machine, a damaged file, or the file is in the wrong folder on the USB stick. | Check which format your machine reads in the file formats guide, then re-export or re-copy the file. |
If the problem is in the file, converting it to another format won't help: the same stitches come along. It needs to be edited or rebuilt. Send it over through file conversion & fixes and I'll tell you whether it can be repaired or needs re-digitizing. Problems only on caps? Read the flat to cap conversion guide.
What to send your digitizer
The more clearly you describe the job, the more accurate the first file will be. Include:
- Your artwork: the largest JPG or PNG you have, or a vector file (AI, EPS, PDF, SVG) if available
- The finished size in inches or millimetres (width or height)
- The item and fabric: polo, T-shirt, hoodie, cap, jacket, towel, bag
- The placement: left chest, cap front, sleeve, full back
- The file format your machine reads (DST, PES, EXP, JEF and so on)
- Thread colours, if you have brand colours or Madeira / Isacord numbers
Not sure which format you need? The embroidery file formats guide matches each machine brand to its file type.
Typical sizes to plan for
| Placement | Common width | Notes |
|---|---|---|
| Left chest | 3–4 in | The most common logo placement on polos and shirts. |
| Cap front | Up to about 4.5 in wide, 2–2.25 in tall | Needs cap-specific digitizing. See cap digitizing. |
| Sleeve | 2.5–3.5 in | Keep text short and bold. |
| Full back | 10–12 in | Large fills; density and underlay matter most here. |
Exact limits depend on your hoop and machine, so always confirm the size with your embroidery shop.
What does it cost?
Most simple logos are priced by size and detail rather than by stitch count alone. The embroidery digitizing cost guide explains what changes the price, and you can see current starting prices on the pricing section. If you already have a DST that sews badly, it can usually be fixed or rebuilt rather than started from scratch.
Frequently asked questions
What is a DST file type?
DST is the Tajima embroidery stitch format. It stores needle movements, jumps, trims and colour-change stops, but not thread colours or editable shapes. It is the most widely accepted format for commercial and multi-head embroidery machines.
Can I make a DST file for free?
Yes. The free Inkscape extension Ink/Stitch lets you digitize a design yourself and save it as DST. It takes time to learn, and the file should be test-sewn before production. A hand-digitized DST costs from $10 for a left-chest or cap logo, and new clients can get their first design free.
How do I open or view a DST file?
Computers can't preview a DST the way they show a JPG. Open it in embroidery software or a free embroidery viewer, or load it straight onto the machine. The colour sheet that comes with the file shows which thread goes where.
Can I convert a JPG to DST for free?
Free online converters and auto-digitizing tools can produce a DST, but they guess at stitch types, density and underlay, so the result often puckers, breaks threads or loses small text. For anything you will sell or wear, the file should be digitized by hand.
How long does it take to convert a JPG to DST?
A simple left-chest logo is usually digitized within 12 to 24 hours. Large or very detailed designs such as jacket backs can take longer.
What size should my JPG be?
Send the largest, clearest version you have. A digitizer redraws the design, so a blurry image can still work, but a sharp image or a vector file (AI, EPS, PDF, SVG) gives the most accurate result, especially for small text.
Can one DST file be used for any size?
No. A DST is built for one size. You can scale it about 10 to 20 percent on the machine; for bigger changes the design should be resized from the editable EMB file or digitized again at the new size.
Does a DST file include thread colours?
A DST records where colour changes happen but not the thread colours themselves, so it should come with a colour sheet or preview showing which thread goes where.
Send your logo. Get a hand-digitized DST, usually within 12–24 hours.
Tell me the size, the item and your machine. You get the DST, the editable EMB, a stitch count and a colour sheet, with free edits until it's right.