alldepstodeb downloads a package and all dependencies into respective '.deb' files. Handy if you want to keep the download or to move it to another computer that doesn't have internet access.
Normally you'd use a package manager to download a debian package. This is fine if the package always stays available online, but if you want to install it to another computer without internet access, you'll need the package itself and all it's dependencies (all the required files that go with the package). This program downloads everything you need to keep for the future.
(If it's easier, here's a youtube demo video).
This will work on 32bit or 64bit systems, and on anything which is capable of using deb files - Debian (of course), Ubuntu / Xubuntu / Lubuntu / Kali / antiX / Zorin / Mint / Devuan / LXLE / Slax (version 9 and above) etc.
If you have any suggestions, please get in touch via email. Many thanks.