diff --git a/Lib/json/tool.py b/Lib/json/tool.py
index 9ab6d65..0f108c6 100644
--- a/Lib/json/tool.py
+++ b/Lib/json/tool.py
@@ -31,7 +31,8 @@
         except ValueError as e:
             raise SystemExit(e)
     with outfile:
-        json.dump(obj, outfile, sort_keys=True, indent=4)
+        json.dump(obj, outfile, sort_keys=True,
+                  indent=4, separators=(',', ': '))
         outfile.write('\n')
 
 
diff --git a/Lib/test/json_tests/test_tool.py b/Lib/test/json_tests/test_tool.py
index 8a3cc6f..1f2c8a2 100644
--- a/Lib/test/json_tests/test_tool.py
+++ b/Lib/test/json_tests/test_tool.py
@@ -19,19 +19,19 @@
     [
         [
             "blorpie"
-        ], 
+        ],
         [
             "whoops"
-        ], 
-        [], 
-        "d-shtaeou", 
-        "d-nthiouh", 
-        "i-vhbjkhnth", 
+        ],
+        [],
+        "d-shtaeou",
+        "d-nthiouh",
+        "i-vhbjkhnth",
         {
             "nifty": 87
-        }, 
+        },
         {
-            "field": "yes", 
+            "field": "yes",
             "morefield": false
         }
     ]
diff --git a/Misc/NEWS b/Misc/NEWS
index 48c5111..39eed91 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -167,6 +167,8 @@
 Library
 -------
 
+- Issue #16476: Fix json.tool to avoid including trailing whitespace.
+
 - Issue #16549: Make json.tool work again on Python 3 and add tests.
   Initial patch by Berker Peksag and Serhiy Storchaka.