gistfile1.py

#!/usr/bin/env python

import sys
import simplejson

while True:
    line = sys.stdin.readline()
    if not line:
        break

    parts = line.split("\t")
    formatted = []
    for part in parts:
        try:
            f = simplejson.dumps(simplejson.loads(part), sort_keys = False, indent = 4)
        except:
            f = part

        formatted.append(f.rstrip("\n"))

    print "\t".join(formatted)