JEF is the native embroidery format for Janome and Elna sewing machines. If you have a PNG logo, photograph, or clipart you want to stitch out, you need to digitize it into a JEF file first. With SewFlow, you can do this entirely in your browser — no software to install, free to convert and preview, and just create a free account to download your file (1 free download every month).
What You'll Need
- •A PNG image (transparent background works best)
- •A Janome or Elna embroidery machine
- •A USB stick to transfer the file to your machine
- •Two minutes of your time
Step-by-Step: Convert PNG to JEF with SewFlow
- 1Open the SewFlow Image to Embroidery converter at sewflow.com/image.
- 2Click the upload area or drag and drop your PNG file into it. SewFlow accepts PNG, JPEG, BMP, GIF, WebP, and TIFF.
- 3If your image has a background you want removed, toggle on the 'Remove Background' switch. SewFlow automatically strips the background using AI so only your subject remains.
- 4Adjust the design size using the width and height sliders. Standard cap designs are typically 60–80 mm; shirt designs are often 100–200 mm wide.
- 5In the 'Output Format' dropdown, select JEF.
- 6Click 'Preview Stitches' to see an animated stitch-by-stitch simulation of your design.
- 7When you're satisfied, click 'Download JEF'. The file downloads instantly to your device.
- 8Copy the .jef file to your USB stick and insert it into your Janome or Elna machine. Select the design from the machine's menu and start stitching.
Ready to convert your PNG? Start the free online converter now:
Open Image to Embroidery →About the JEF Format
JEF (Janome Embroidery Format) is a binary stitch file developed by Janome for their sewing and embroidery machines. It stores absolute needle positions, color change commands, and jump stitches. JEF files carry a .jef extension and are used by most Janome models as well as some Elna machines that share the same underlying platform.
Tips for Better JEF Results
- •Use PNG images with transparent or solid white backgrounds for the cleanest edge detection.
- •Simple clipart and logos convert better than photographs. The fewer colors, the crisper the stitching.
- •Avoid very small designs (under 30 mm) as fine details can become unreadable in thread.
- •Increase the design size slightly if the preview shows stitches that look cramped.
- •Always do a test stitch on scrap fabric before stitching on your final project.
Which Janome Machines Use JEF?
JEF files are compatible with a wide range of Janome models including the Janome Memory Craft series (MC500E, MC9900, MC15000), the Janome Horizon series, and many Elna Expressive and Elna eXpressive models. Check your machine's manual to confirm JEF support.
Pro Tip
If your Janome machine also supports JEF+, SewFlow's JEF output is fully compatible — JEF+ is a superset of JEF and will read standard .jef files without issue.