Like crypt.sh but way better, this program will encrypt/decrypt all specified files in the current subdirectory and recursively downwards. It’s 100 lines shorter than its BASH counterpart, infinitely more reliable and incredibly fast (10,000 files in < 4 seconds!).
This can be valuable before you backup to the cloud, for example. It’ll blow through your Documents folder fast, so you can encrypt everything, upload for backup and then decrypt again with the upload being by far the slowest part of the process.