Minimal Python script to validate JSON. Just uses standard library 'json' loads one ore files and catches and reports the first exception thrown in attempting to load and parse each file. Takes one argument a path to the files to validate. The script will glob* that path and attempt to load and parse as JSON all files found there.

ValidateJSON

#!/usr/bin/python

from glob import glob
import json
import sys


def main(path):
    files = glob(path)
    for file in files:
        try:
            json.load(open(file))
        except ValueError as err:
            print "file {0} failed validation. Error: {1}".format(file, err)

if __name__ == '__main__':
    # Example Usage: ./validate_json.py ./path_to_files_to_validate/\*
    main(sys.argv[1])