diff --git a/httprunner/__about__.py b/httprunner/__about__.py
index 2b036597..44b5f9db 100644
--- a/httprunner/__about__.py
+++ b/httprunner/__about__.py
@@ -1,7 +1,7 @@
 __title__ = 'HttpRunner'
 __description__ = 'One-stop solution for HTTP(S) testing.'
 __url__ = 'https://github.com/HttpRunner/HttpRunner'
-__version__ = '1.3.0'
+__version__ = '1.3.1'
 __author__ = 'debugtalk'
 __author_email__ = 'mail@debugtalk.com'
 __license__ = 'MIT'
diff --git a/httprunner/cli.py b/httprunner/cli.py
index 01c74076..83462dcc 100644
--- a/httprunner/cli.py
+++ b/httprunner/cli.py
@@ -8,7 +8,7 @@ from httprunner import logger
 from httprunner.__about__ import __version__
 from httprunner.task import HttpRunner
 from httprunner.utils import (create_scaffold, load_dot_env_file, print_output,
-                              string_type, validate_json_file)
+                              string_type, validate_json_file, prettify_json_file)
 
 
 def main_hrun():
@@ -43,6 +43,9 @@ def main_hrun():
     parser.add_argument(
         '--validate', nargs='*',
         help="Validate JSON testset format.")
+    parser.add_argument(
+        '--prettify', nargs='*',
+        help="Prettify JSON testset format.")
 
     args = parser.parse_args()
     logger.setup_logger(args.log_level)
@@ -54,6 +57,9 @@ def main_hrun():
     if args.validate:
         validate_json_file(args.validate)
         exit(0)
+    if args.prettify:
+        prettify_json_file(args.prettify)
+        exit(0)
 
     dot_env_path = args.dot_env_path or os.path.join(os.getcwd(), ".env")
     if dot_env_path:
diff --git a/httprunner/utils.py b/httprunner/utils.py
index 5cf64e6c..c8006317 100644
--- a/httprunner/utils.py
+++ b/httprunner/utils.py
@@ -431,12 +431,38 @@ def validate_json_file(file_list):
             logger.log_warning("Only JSON file format can be validated.")
             continue
 
-        logger.color_print("start to validate JSON file: {}".format(json_file), "GREEN")
+        logger.color_print("Start to validate JSON file: {}".format(json_file), "GREEN")
 
-        with open(json_file) as stream:
+        with io.open(json_file) as stream:
             try:
                 json.load(stream)
             except ValueError as e:
                 raise SystemExit(e)
 
         print("OK")
+
+def prettify_json_file(file_list):
+    """ prettify JSON testset format
+    """
+    for json_file in set(file_list):
+        if not json_file.endswith(".json"):
+            logger.log_warning("Only JSON file format can be prettified.")
+            continue
+
+        logger.color_print("Start to prettify JSON file: {}".format(json_file), "GREEN")
+
+        dir_path = os.path.dirname(json_file)
+        file_name, file_suffix = os.path.splitext(os.path.basename(json_file))
+        outfile = os.path.join(dir_path, "{}.pretty.json".format(file_name))
+
+        with io.open(json_file, 'r', encoding='utf-8') as stream:
+            try:
+                obj = json.load(stream)
+            except ValueError as e:
+                raise SystemExit(e)
+
+        with io.open(outfile, 'w', encoding='utf-8') as out:
+            json.dump(obj, out, indent=4, separators=(',', ': '))
+            out.write('\n')
+
+        print("success: {}".format(outfile))