You should be able to convert Janome JEF embroidery files to Orchida EMB format using Wilcom TrueSizer program.
Convert Janome embroidery layout to Embroidery design file.
We have found 3 software records in our database eligible for .jef to .emb file format conversion.
Microsoft Windows software - convert jef to emb on Windows
A free software for viewing and converting of various embroidery formats
Convert from jef file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned jef to emb. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
An easy embroidery and apparel decoration design software
Multiplatform software - convert jef to emb on any platform
An embroidery editor and converter