EMB

Status

Field	Value
Extension(s)	.emb
Common ecosystem	Wilcom
Format family	Native working file
Satin Studio status	Researching
Open / import	No
Export	No
Confidence	High for ecosystem role.

What it is

EMB is Wilcom’s native working format. It can preserve editable outlines, stitch settings, lettering, colors, icons, generated stitches, and software-specific properties.

Satin Studio direction

High-value import research, but much harder than stitch-stream support because editable object semantics matter.

Versions and variants

EMB is a native working format and is versioned by software generation. Support would need a version-specific object-model mapping, not just stitch parsing.

File identification notes

Reported EMB-family files contain vectors, icon data, color data, and stitch data. Some internal data is compressed and may use additional byte transformation before or around compressed streams.

Observed structure notes

• EMB-family files are native working documents. They may contain object vectors, icons/previews, colors, generated stitches, settings, and compressed internal streams.
• Any useful parser needs a version marker and an object stream map before stitch data can be interpreted safely.

Structure sketch

EMB is a native working file. A parser must find objects and metadata before extracting stitches.

struct EmbContainer<'a> {
    version_or_header: &'a [u8],        // version-specific
    object_streams: &'a [EmbStream<'a>],
    compressed_streams: &'a [EmbStream<'a>],
}

struct EmbStream<'a> {
    kind: &'a str,                      // vectors, icons, colors, stitches, settings, unknown
    payload: &'a [u8],
}

What we still need

Legally usable files, version identification, compression/container notes, and an object-model mapping strategy.