adding ensure_ascii to configuration, and renaming configuration variable indent_size to indent. it's possible to specify not only the size of spaces but also string

Pretty JSON.sublime-settings

@@ -1,5 +1,6 @@
 {
     "use_entire_file_if_no_selection" : true,
-    "indent_size" : 4,
-    "sort_keys" : false
+    "indent" : 4,
+    "sort_keys" : false,
+    "ensure_ascii" : false
 }

PrettyJson.py

@@ -27,6 +27,6 @@ class PrettyjsonCommand(sublime_plugin.TextCommand):
 
             try:
                 obj = json.loads(self.view.substr(selection), object_pairs_hook=OrderedDict)
-                self.view.replace(edit, selection, json.dumps(obj, indent=s.get("indent_size", 4), ensure_ascii=False, sort_keys=s.get("sort_keys", False), separators=(',', ': ')))
+                self.view.replace(edit, selection, json.dumps(obj, indent=s.get("indent", 4), ensure_ascii=s.get("ensure_ascii", False), sort_keys=s.get("sort_keys", False), separators=(',', ': ')))
             except Exception, e:
                 sublime.status_message(str(e))

README.md

@@ -18,9 +18,21 @@ If JSON is not valid it will be displayed in status bar of sublime.
 
 **use_entire_file_if_no_selection** - true
 
-**indent_size** - 4
+**indent** - 4
 
 **sort_keys** - false
 
+**ensure_ascii** - false
+
+## Using tabs for indentation
+
+You can change configuration key **indent** to string value "\t" or any other string.
+
+```
+"indent_size" : "\t",
+```
+
+Be sure "Indent Using Spaces" is unchecked otherwise you will not see effect and ST2 will convert it back to spaces.
+
 ## Thanks
 https://github.com/the3rdhbtaylor