env2x outputs env variables in json, yaml, env or string formats.

env2json [-p] VAR1 [VAR2] [VAR3{=value}] ...
env2json VAR1 [VAR2] [VAR3{=value}] ...
env2env  [-s] [-e] VAR1 [VAR2] [VAR3{=value}] ...
env2file VAR [file] [mode]

env2json -p USER HOME PATH=$HOME/bin:$PATH

Output:

{
  "HOME": "/Users/john",
  "PATH": "/Users/john/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin",
  "USER": "john"
}

env2json USER HOME PATH=$HOME/bin:$PATH

Output:

{"HOME":"/Users/john","PATH":"/Users/john/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin","USER":"john"}

env2yaml USER HOME PATH=$HOME/bin:$PATH

Output:

HOME: /Users/john
PATH: /Users/john/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
USER: john

env2env USER HOME PATH=$HOME/bin:$PATH

Output:

HOME="/Users/john"
PATH="/Users/john/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
USER="john"

env2env -e USER HOME PATH=$HOME/bin:$PATH

Output:

export HOME="/Users/john"
export PATH="/Users/john/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
export USER="john"

env2env -s USER HOME PATH=$HOME/bin:$PATH

Output:

HOME="/Users/john" PATH="/Users/john/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin" USER="john" 

env2file TOKEN token.txt 600

Writes TOKEN value to token.txt and sets file mode 0600