stegcracker

$ stegcracker <image.jpg>

steghide

$ steghide
extract -sf <image.jpg> -p <password>
embed -cf <image.jpg> -ef <file>

zsteg

$ sudo gem install zsteg

$ zsteg <image.png>

pngcheck

$ pngcheck -v <image.png>

stegoveritas

$ pip3 install stegoveritas
$ stegoveritas_install_deps

$ stegoveritas <image>

binwalk

$ binwalk <image.jpg>
-e # extract known file types
# --dd=<type:ext:cmd> extract <type> signatures, give the files an extension of <ext>, and execute <cmd> e.g. =".*"

Sonic Visualiser

Run from AppImage

Layer > Add Spectogram

In-built

$ file <image.jpg>
$ strings <image.jpg>

$ cat <image.jpg> <file> > <steg_image.jpg>

$ exiftool
-Comment <comment> # etc