diff --git a/Lib/json/tool.py b/Lib/json/tool.py
index 0490b8c0be11df..db092e3260e59c 100644
--- a/Lib/json/tool.py
+++ b/Lib/json/tool.py
@@ -15,6 +15,7 @@
 import sys
 from pathlib import Path
 
+_SENTINEL = object()
 
 def main():
     prog = 'python -m json.tool'
@@ -62,7 +63,7 @@ def main():
     with options.infile as infile:
         try:
             if options.json_lines:
-                objs = (json.loads(line) for line in infile)
+                objs = (json.loads(line) if line.strip() else _SENTINEL for line in infile)
             else:
                 objs = (json.load(infile),)
 
@@ -72,7 +73,8 @@ def main():
                 out = options.outfile.open('w', encoding='utf-8')
             with out as outfile:
                 for obj in objs:
-                    json.dump(obj, outfile, **dump_args)
+                    if obj is not _SENTINEL:
+                        json.dump(obj, outfile, **dump_args)
                     outfile.write('\n')
         except ValueError as e:
             raise SystemExit(e)
diff --git a/Lib/test/test_json/test_tool.py b/Lib/test/test_json/test_tool.py
index 2b63810d53981e..33fa42e231b8be 100644
--- a/Lib/test/test_json/test_tool.py
+++ b/Lib/test/test_json/test_tool.py
@@ -86,6 +86,24 @@ class TestTool(unittest.TestCase):
     }
     """)
 
+    jsonlines_emptylines_raw = textwrap.dedent("""\
+    {"foo":1}
+
+    {"bar":2}
+
+    """)
+
+    jsonlines_emptylines_expect = textwrap.dedent("""\
+    {
+        "foo": 1
+    }
+
+    {
+        "bar": 2
+    }
+
+    """)
+    
     def test_stdin_stdout(self):
         args = sys.executable, '-m', 'json.tool'
         process = subprocess.run(args, input=self.data, capture_output=True, text=True, check=True)
@@ -147,6 +165,12 @@ def test_jsonlines(self):
         self.assertEqual(process.stdout, self.jsonlines_expect)
         self.assertEqual(process.stderr, '')
 
+    def test_jsonlines_emptylines(self):
+        args = sys.executable, '-m', 'json.tool', '--json-lines'
+        process = subprocess.run(args, input=self.jsonlines_emptylines_raw, capture_output=True, text=True, check=True)
+        self.assertEqual(process.stdout, self.jsonlines_emptylines_expect)
+        self.assertEqual(process.stderr, '')
+
     def test_help_flag(self):
         rc, out, err = assert_python_ok('-m', 'json.tool', '-h')
         self.assertEqual(rc, 0)
diff --git a/Misc/NEWS.d/next/Library/2021-11-30-07-15-32.bpo-45929.EeKtTK.rst b/Misc/NEWS.d/next/Library/2021-11-30-07-15-32.bpo-45929.EeKtTK.rst
new file mode 100644
index 00000000000000..752e7e56e6548e
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-11-30-07-15-32.bpo-45929.EeKtTK.rst
@@ -0,0 +1 @@
+Let json.tool --json-lines handle empty rows