jwt decode shell script

jwtdecode.sh

#!/bin/sh

# Decode JWT token
# Usage: echo <jwt_token> | jwtdecode
# requires jq and base64

while read input; do
  echo $input  | cut -d . -f 1,2 | tr '.' '\n' | \
    while read str;do
      echo "$str"==== | fold -w 4 | sed '$ d' | tr -d '\n' | base64 --decode | jq
    done
  done