diff --git a/doc/_stdlib_gen/stdlib-content.jsonnet b/doc/_stdlib_gen/stdlib-content.jsonnet
index 52ac42f1..63fb7341 100644
--- a/doc/_stdlib_gen/stdlib-content.jsonnet
+++ b/doc/_stdlib_gen/stdlib-content.jsonnet
@@ -89,6 +89,28 @@ local exampleDocMultiline(mid, ex) =
             The argument <code>a</code> may have any type.
           |||,
         },
+        {
+          name: 'isNull',
+          params: ['x'],
+          availableSince: 'upcoming',
+          description: |||
+            Returns true if the given value is null, false otherwise.
+          |||,
+          examples: [
+            {
+              input: 'std.isNull(null)',
+              output: true,
+            },
+            {
+              input: 'std.isNull(42)',
+              output: false,
+            },
+            {
+              input: 'std.isNull("string")',
+              output: false,
+            },
+          ],
+        },
       ],
     },
     {
diff --git a/stdlib/std.jsonnet b/stdlib/std.jsonnet
index ec7ab8f4..f627a958 100644
--- a/stdlib/std.jsonnet
+++ b/stdlib/std.jsonnet
@@ -33,6 +33,7 @@ limitations under the License.
   isObject(v):: std.type(v) == 'object',
   isArray(v):: std.type(v) == 'array',
   isFunction(v):: std.type(v) == 'function',
+  isNull(v):: v == null,
 
   toString(a)::
     if std.type(a) == 'string' then a else '' + a,
diff --git a/test_suite/stdlib.jsonnet b/test_suite/stdlib.jsonnet
index 9d11766a..6d3a40dc 100644
--- a/test_suite/stdlib.jsonnet
+++ b/test_suite/stdlib.jsonnet
@@ -121,6 +121,8 @@ std.assertEqual(std.isNumber(0), true) &&
 std.assertEqual(std.isObject({}), true) &&
 std.assertEqual(std.isArray([]), true) &&
 std.assertEqual(std.isFunction(function() 0), true) &&
+std.assertEqual(std.isNull(null), true) &&
+std.assertEqual(std.isNull('foo'), false) &&
 
 std.assertEqual(std.isString(null), false) &&
 std.assertEqual(std.isBoolean(null), false) &&