Drop your DST file. We'll convert it to JEF right here in your browser, your file never leaves your device.
Drop your file here
or click to pick from your device
How it works
Click the dropzone above or drag a DST from your desktop. Files of any size, there's no upload, so there's no upload limit.
The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.
Get your JEF the moment the conversion finishes. Convert another, or close the tab.
Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.
Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.
No account required. No watermark on the output. No queue. Open source, every line of conversion code is public.
Formats involved
DST is Tajima's industrial embroidery file format and the most universally-supported design format on commercial machines. 512-byte header followed by 3-byte stitch records. Brother, Janome, Bernina, Singer, Husqvarna Viking, all read DST as a fallback even when their native format is different.
How to open
Every commercial embroidery machine. Free viewers: Embird (paid), Embroidermodder (free), online embroidery viewers like StitchView.
JEF is Janome's embroidery format (also Memorycraft, Elna). 116-byte header with thread color list, then 2-byte stitch deltas. Used by Janome Memorycraft 9700/11000/15000 series and Elna eXpressive machines.
How to open
Janome Digitizer, Elna sewing software, Embird. Free: Embroidermodder.
Related tools
How we compare
| Feature | Ustwineconvert | CloudConvert | iLovePDF | FreeConvert | Smallpdf |
|---|---|---|---|---|---|
| Files uploaded to a server | |||||
| Free file size limit | No limit | 1 GB | 200 MB | 1 GB | 5 GB |
| Free conversions per day | Unlimited | 10/day | Limited | Limited | 2/day |
| Signup required | |||||
| Watermark on output | |||||
| Open source | |||||
| Works offline (after first load) |
Last verified May 2026 from each competitor's pricing and FAQ pages. Limits and pricing change frequently.
FAQ
Yes. No signup, no watermark, no daily file count limit. The entire engine is open source, you can read the conversion code on GitHub.
Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.
Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.
Universal embroidery design interchange. Janome and Elna embroidery machines. The most common reason to convert is compatibility, JEF works in places where DST doesn't, or vice versa.
Every commercial embroidery machine. Free viewers: Embird (paid), Embroidermodder (free), online embroidery viewers like StitchView.
Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.
Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.