gedit json formatter
Ensure that you have an up-to-date version of Python. It’s included with nearly every Linux distribution.
Ensure that the External Tools plugin is installed
Click Edit -> Preferences
Select the Plugins tab
Check the box next to External Tools
Click Close
Add the Format JSON command
Click Tools -> Manage External Tools…
Click New (bottom left, looks like a piece of paper with a plus sign)
Enter a name (Format JSON)
Paste this text into the text window on the right
#! /usr/bin/env python
import json
import sys
j = json.load(sys.stdin)
print json.dumps(j, sort_keys=True, indent=2)