Convert EASM to IGS

eDrawing files (.easm) usually cannot be converted to anything else, because these files are used as previews and for printing, but not  for further editing, which makes any kind of easm conversion troublesome (including export to IGES format).

In case you need to create IGES file from a Solidworks drawing, you will need the original source file because without it, it won't be most likely possible. Some versions of eDrawing also allow the author to "unlock" the files for further use.

Simply put, it is impossible to convert EASM to IGS directly.
Thus, there is no so-called easm to igs converter or a free online .easm to .igs converter to be found.