base64-advanced-cli

This command line interface helps you to encode/decode base64 data with advanced features like files encoding/decoding, jwt review and html image encoding.

Install

$ npm install --global base64-advanced-cli

... or just try it without installing it :

$ npx base64-advanced-cli -e "Hello World!"

... or try the Online Demo 💪

Usage

This CLI provides the following command : b64

88             ad8888ba,          ,d8    
88            8P'    "Y8        ,d888    
88           d8               ,d8" 88    
88,dPPYba,   88,dd888bb,    ,d8"   88    
88P'    "8a  88P'    `8b  ,d8"     88    
88       d8  88       d8  8888888888888  
88b,   ,a8"  88a     a8P           88    
8Y"Ybbd8"'    "Y88888P"            88    
                                         
                                         
base64-advanced-client v1.x.x
Usage: b64 [options]

Options:
  -d, --decode [data]           set mode to encoding
  -e, --encode [data]           set mode to decoding
  -i, --input-file <filename>   read input from a file
  -o, --output-file <filename>  write output to a file
  -v, --version                 display the version of this CLI
  --jwt <data>                  display the content of a jwt token
  --html                        encode an image into an html tag containing base64 data
  --no-update-notification      do not display update notifications
  -h, --help                    display help for command

Usage examples :

Encoding :

$ b64 -e "Hello World!"

Will return SGVsbG8gV29ybGQh value.

Decoding :

$ b64 -d SGVsbG8gV29ybGQh

Will return Hello World! value.

Writing output to a file :

$ b64 -d SGVsbG8gV29ybGQh -o decoded.txt

Will create a file named decoded.txt containingext " Hello world! " text, instead of displaying the output in the console.

Reading input from a file :

$ b64 -e -i decoded.txt

Will read file contents and encodode it, rather than using the command input.

Stdin usage

You can also read input from stdin (only on unix systems) to encode & decode data

$ echo "Hello World!" | b64 -e

will return SGVsbG8gV29ybGQhCg==.

stdin is also applicable for decoding purposes

$ echo SGVsbG8gV29ybGQhCg== | b64 -d

will return Hello World!.

JWT Preview :

This CLI provides a simple way to preview the content of JWT tokens.

$ b64 --jwt eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoiSm9obiBEb2UiLCJpYXQiOjE1MTYyMzkwMjJ9.hqWGSaFpvbrXkOWc6lrnffhNWR19W_S1YKFBx2arWBk

will return the following output :

Header : {
    "alg": "HS256",
    "typ": "JWT"
}
Body : {
    "name": "John Doe",
    "iat": 1516239022
}

⚠️ The CLI does NOT validate the signature of the token since this is not the purose of this tool.

HTML Image base 64 encoding :

You can use this CLI to directly encode your images as html base64 images (with automatic mime type dectection).

$  b64 -e --html -i image.png

Will return the html tag containing the encoded image in base 64 format (e.g. <img src="data:image/png;base64,iVBORw0K[...]g==" />).

$ b64 -e --html -i image.png -o image.html

Will perform the same operation but will save the image html content in a file rather than simply displaying the output.

Releases

Find all releases on npm : https://www.npmjs.com/package/base64-advanced-cli

⚠️ Note

This library is still under development some changes may occur, great features incoming 💪.

Any improvement ideas are welcome, feel free to create issues for evolutions/bugs on the repository of the project.