How to encode and decode file to base64 offline

Although there are a number of websites that allow to convert file to base64 and vice versa. However, it could leads to data leak issue if these data from your working project.

Therefore, I would like to introduce a tip to convert file to base64 (and vice versa) offline.

1) Encode file (ex: pdf) to base64:

base64 -w 0 test1.pdf

2) Encode a file to base64 and write it to file:

base64 -w 0 test1.pdf > test1.txt

3) Decode base64 to file:

base64 -d test1.txt > test1.pdf

Tool need to use:

1. Linux: use the default cmd
2. Window: use the git bash which I believe all the developers already installed