diff --git a/Libraries/LibWeb/IndexedDB/IDBObjectStore.cpp b/Libraries/LibWeb/IndexedDB/IDBObjectStore.cpp
index a384ac28932..bf0e206b200 100644
--- a/Libraries/LibWeb/IndexedDB/IDBObjectStore.cpp
+++ b/Libraries/LibWeb/IndexedDB/IDBObjectStore.cpp
@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/String.h>
+#include <LibJS/Runtime/Array.h>
 #include <LibWeb/Bindings/IDBObjectStorePrototype.h>
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/HTML/EventNames.h>
@@ -40,4 +42,21 @@ void IDBObjectStore::visit_edges(Visitor& visitor)
     visitor.visit(m_transaction);
 }
 
+// https://w3c.github.io/IndexedDB/#dom-idbobjectstore-keypath
+JS::Value IDBObjectStore::key_path() const
+{
+    if (!m_store->key_path().has_value())
+        return JS::js_null();
+
+    return m_store->key_path().value().visit(
+        [&](String const& value) -> JS::Value {
+            return JS::PrimitiveString::create(realm().vm(), value);
+        },
+        [&](Vector<String> const& value) -> JS::Value {
+            return JS::Array::create_from<String>(realm(), value.span(), [&](auto const& entry) -> JS::Value {
+                return JS::PrimitiveString::create(realm().vm(), entry);
+            });
+        });
+}
+
 }
diff --git a/Libraries/LibWeb/IndexedDB/IDBObjectStore.h b/Libraries/LibWeb/IndexedDB/IDBObjectStore.h
index 854845e05e7..7551b0ddd82 100644
--- a/Libraries/LibWeb/IndexedDB/IDBObjectStore.h
+++ b/Libraries/LibWeb/IndexedDB/IDBObjectStore.h
@@ -23,6 +23,8 @@ public:
     virtual ~IDBObjectStore() override;
     [[nodiscard]] static GC::Ref<IDBObjectStore> create(JS::Realm&, GC::Ref<ObjectStore>, GC::Ref<IDBTransaction>);
 
+    JS::Value key_path() const;
+
 protected:
     explicit IDBObjectStore(JS::Realm&, GC::Ref<ObjectStore>, GC::Ref<IDBTransaction>);
     virtual void initialize(JS::Realm&) override;
diff --git a/Libraries/LibWeb/IndexedDB/IDBObjectStore.idl b/Libraries/LibWeb/IndexedDB/IDBObjectStore.idl
index de929eb3e24..3e13fb9b03a 100644
--- a/Libraries/LibWeb/IndexedDB/IDBObjectStore.idl
+++ b/Libraries/LibWeb/IndexedDB/IDBObjectStore.idl
@@ -5,7 +5,7 @@
 [Exposed=(Window,Worker)]
 interface IDBObjectStore {
     [FIXME] attribute DOMString name;
-    [FIXME] readonly attribute any keyPath;
+    readonly attribute any keyPath;
     [FIXME] readonly attribute DOMStringList indexNames;
     [FIXME, SameObject] readonly attribute IDBTransaction transaction;
     [FIXME] readonly attribute boolean autoIncrement;