Encrypt zip files on Mac OS

TL;DR: Zip file with password:

zip -e archive.zip file

Zip folder with password:

zip -er archive.zip folder/

Let’s say you have the following directory layout:

└── secrets
    ├── keys.txt
    └── passwords.txt

1 directory, 2 files

To zip a file with encryption:

zip -e Archive.zip secrets/passwords.txt

Archive.zip is the compressed archive.

To zip a directory with encryption:

zip -er Archive.zip secrets/

To unzip an archive:

unzip Archive.zip

You’ll be prompted for the password if it’s encrypted.

And you can also do the same through the GUI:

open Archive.zip

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