You can use npm install to install module:
npm install easy-crypt
Or simply git clone this repository
git clone https://github.com/NahisWayard/easy-crypt
You just need to run the main script crypt.js and follow the instuctions :
Enter 1 to encode your file.
Enter 2 to decode your file.
Enter 3 to exit the script.
After your choice you will have to enter the path to your file and the the key that you want to use to encode/decode the file.
If you decode a file the output will be saved in a file named Output Decoded - {path to your file}.txt