diff --git a/src/View/Antlers/Language/Runtime/ModifierManager.php b/src/View/Antlers/Language/Runtime/ModifierManager.php
index 3d3b9bd5178..414b5260490 100644
--- a/src/View/Antlers/Language/Runtime/ModifierManager.php
+++ b/src/View/Antlers/Language/Runtime/ModifierManager.php
@@ -27,6 +27,8 @@ class ModifierManager
      */
     protected static $nullAwareModifiers = [
         'bool_string',
+        'json',
+        'to_json',
     ];
 
     public static function isModifier(ParameterNode $node)
diff --git a/tests/Antlers/Runtime/CoreModifiersTest.php b/tests/Antlers/Runtime/CoreModifiersTest.php
index 851c57f4705..0316e62a45a 100644
--- a/tests/Antlers/Runtime/CoreModifiersTest.php
+++ b/tests/Antlers/Runtime/CoreModifiersTest.php
@@ -623,6 +623,23 @@ public function test_bool_string_outputs_false_for_null()
         $this->assertSame('FALSE', $this->renderString('{{ empty_field | bool_string | upper }}', $data, true));
         $this->assertSame('true', $this->renderString('{{ filled_field | bool_string }}', $data, true));
     }
+
+    public function test_to_json_outputs_null_for_null()
+    {
+        $data = [
+            'bare' => null,
+            'empty_field' => new Value(null, 'empty_field', new Text),
+            'filled_field' => new Value('yes', 'filled_field', new Text),
+        ];
+
+        $this->assertSame('null', $this->renderString('{{ bare | to_json }}', $data, true));
+        $this->assertSame('null', $this->renderString('{{ empty_field | to_json }}', $data, true));
+        $this->assertSame('null', $this->renderString('{{ empty_field | json }}', $data, true));
+        $this->assertSame('null', $this->renderString('{{ missing | to_json }}', $data, true));
+        $this->assertSame('null', $this->renderString("{{ empty_field | to_json('pretty') }}", $data, true));
+        $this->assertSame('NULL', $this->renderString('{{ empty_field | to_json | upper }}', $data, true));
+        $this->assertSame('"yes"', $this->renderString('{{ filled_field | to_json }}', $data, true));
+    }
 }
 
 class SimpleEntryObject implements Arrayable