diff --git a/Libraries/LibWeb/CMakeLists.txt b/Libraries/LibWeb/CMakeLists.txt
index 72fcb36f1ef..d2e3585485e 100644
--- a/Libraries/LibWeb/CMakeLists.txt
+++ b/Libraries/LibWeb/CMakeLists.txt
@@ -80,6 +80,7 @@ set(SOURCES
     ContentSecurityPolicy/Violation.cpp
     Cookie/Cookie.cpp
     Cookie/ParsedCookie.cpp
+    CookieStore/CookieStore.cpp
     CredentialManagement/Credential.cpp
     CredentialManagement/CredentialsContainer.cpp
     CredentialManagement/FederatedCredential.cpp
diff --git a/Libraries/LibWeb/CookieStore/CookieStore.cpp b/Libraries/LibWeb/CookieStore/CookieStore.cpp
new file mode 100644
index 00000000000..b339f63bb09
--- /dev/null
+++ b/Libraries/LibWeb/CookieStore/CookieStore.cpp
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2025, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/CookieStorePrototype.h>
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/CookieStore/CookieStore.h>
+
+namespace Web::CookieStore {
+
+GC_DEFINE_ALLOCATOR(CookieStore);
+
+CookieStore::CookieStore(JS::Realm& realm)
+    : DOM::EventTarget(realm)
+{
+}
+
+void CookieStore::initialize(JS::Realm& realm)
+{
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(CookieStore);
+    Base::initialize(realm);
+}
+
+}
diff --git a/Libraries/LibWeb/CookieStore/CookieStore.h b/Libraries/LibWeb/CookieStore/CookieStore.h
new file mode 100644
index 00000000000..2ce834ea1f4
--- /dev/null
+++ b/Libraries/LibWeb/CookieStore/CookieStore.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/DOM/EventTarget.h>
+
+namespace Web::CookieStore {
+
+// https://cookiestore.spec.whatwg.org/#cookiestore
+class CookieStore final : public DOM::EventTarget {
+    WEB_PLATFORM_OBJECT(CookieStore, DOM::EventTarget);
+    GC_DECLARE_ALLOCATOR(CookieStore);
+
+private:
+    CookieStore(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+};
+
+}
diff --git a/Libraries/LibWeb/CookieStore/CookieStore.idl b/Libraries/LibWeb/CookieStore/CookieStore.idl
new file mode 100644
index 00000000000..6c8edb119c8
--- /dev/null
+++ b/Libraries/LibWeb/CookieStore/CookieStore.idl
@@ -0,0 +1,21 @@
+#import <DOM/EventTarget.idl>
+#import <DOM/EventHandler.idl>
+#import <HTML/Window.idl>
+#import <ServiceWorker/ServiceWorkerGlobalScope.idl>
+
+// https://cookiestore.spec.whatwg.org/#cookiestore
+[Exposed=(ServiceWorker,Window), SecureContext]
+interface CookieStore : EventTarget {
+
+};
+
+// https://cookiestore.spec.whatwg.org/#Window
+[SecureContext]
+partial interface Window {
+    [SameObject] readonly attribute CookieStore cookieStore;
+};
+
+// https://cookiestore.spec.whatwg.org/#ServiceWorkerGlobalScope
+partial interface ServiceWorkerGlobalScope {
+    [SameObject] readonly attribute CookieStore cookieStore;
+};
diff --git a/Libraries/LibWeb/Forward.h b/Libraries/LibWeb/Forward.h
index e6ee6709345..c32c44f4583 100644
--- a/Libraries/LibWeb/Forward.h
+++ b/Libraries/LibWeb/Forward.h
@@ -173,6 +173,12 @@ enum class Source;
 
 }
 
+namespace Web::CookieStore {
+
+class CookieStore;
+
+}
+
 namespace Web::CredentialManagement {
 
 class Credential;
diff --git a/Libraries/LibWeb/HTML/Window.cpp b/Libraries/LibWeb/HTML/Window.cpp
index 858aa7c4f4b..29f83417c30 100644
--- a/Libraries/LibWeb/HTML/Window.cpp
+++ b/Libraries/LibWeb/HTML/Window.cpp
@@ -24,6 +24,7 @@
 #include <LibWeb/CSS/MediaQueryList.h>
 #include <LibWeb/CSS/Parser/Parser.h>
 #include <LibWeb/CSS/Screen.h>
+#include <LibWeb/CookieStore/CookieStore.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/Element.h>
 #include <LibWeb/DOM/Event.h>
@@ -130,6 +131,7 @@ void Window::visit_edges(JS::Cell::Visitor& visitor)
     visitor.visit(m_pdf_viewer_plugin_objects);
     visitor.visit(m_pdf_viewer_mime_type_objects);
     visitor.visit(m_close_watcher_manager);
+    visitor.visit(m_cookie_store);
     visitor.visit(m_locationbar);
     visitor.visit(m_menubar);
     visitor.visit(m_personalbar);
@@ -1121,6 +1123,17 @@ GC::Ref<CloseWatcherManager> Window::close_watcher_manager()
     return GC::Ref { *m_close_watcher_manager };
 }
 
+// https://cookiestore.spec.whatwg.org/#Window
+GC::Ref<CookieStore::CookieStore> Window::cookie_store()
+{
+    auto& realm = this->realm();
+
+    // The cookieStore getter steps are to return this’s associated CookieStore.
+    if (!m_cookie_store)
+        m_cookie_store = realm.create<CookieStore::CookieStore>(realm);
+    return *m_cookie_store;
+}
+
 // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-alert
 void Window::alert(String const& message)
 {
diff --git a/Libraries/LibWeb/HTML/Window.h b/Libraries/LibWeb/HTML/Window.h
index 71eae6495c0..05e4709f352 100644
--- a/Libraries/LibWeb/HTML/Window.h
+++ b/Libraries/LibWeb/HTML/Window.h
@@ -194,6 +194,7 @@ public:
 
     [[nodiscard]] GC::Ref<Navigator> navigator();
     [[nodiscard]] GC::Ref<CloseWatcherManager> close_watcher_manager();
+    [[nodiscard]] GC::Ref<CookieStore::CookieStore> cookie_store();
 
     void alert(String const& message = {});
     bool confirm(Optional<String> const& message);
@@ -310,6 +311,7 @@ private:
     GC::Ptr<Navigator> m_navigator;
     GC::Ptr<Location> m_location;
     GC::Ptr<CloseWatcherManager> m_close_watcher_manager;
+    GC::Ptr<CookieStore::CookieStore> m_cookie_store;
 
     // https://html.spec.whatwg.org/multipage/nav-history-apis.html#window-navigation-api
     GC::Ptr<Navigation> m_navigation;
diff --git a/Libraries/LibWeb/HTML/Window.idl b/Libraries/LibWeb/HTML/Window.idl
index 511a879d01b..84fffd9e615 100644
--- a/Libraries/LibWeb/HTML/Window.idl
+++ b/Libraries/LibWeb/HTML/Window.idl
@@ -1,3 +1,4 @@
+#import <CookieStore/CookieStore.idl>
 #import <CSS/MediaQueryList.idl>
 #import <CSS/Screen.idl>
 #import <CSS/VisualViewport.idl>
diff --git a/Libraries/LibWeb/HTML/WorkerGlobalScope.h b/Libraries/LibWeb/HTML/WorkerGlobalScope.h
index 244ad54791a..d5cab471c90 100644
--- a/Libraries/LibWeb/HTML/WorkerGlobalScope.h
+++ b/Libraries/LibWeb/HTML/WorkerGlobalScope.h
@@ -109,6 +109,8 @@ public:
 protected:
     explicit WorkerGlobalScope(JS::Realm&, GC::Ref<Web::Page>);
 
+    virtual void visit_edges(Cell::Visitor&) override;
+
     virtual void initialize_web_interfaces_impl();
 
     void close_a_worker();
@@ -120,8 +122,6 @@ protected:
 private:
     virtual bool is_window_or_worker_global_scope_mixin() const final { return true; }
 
-    virtual void visit_edges(Cell::Visitor&) override;
-
     GC::Ptr<WorkerLocation> m_location;
     GC::Ptr<WorkerNavigator> m_navigator;
 
diff --git a/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.cpp b/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.cpp
index e8cfc1154b4..a0116a25a98 100644
--- a/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.cpp
+++ b/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.cpp
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibWeb/CookieStore/CookieStore.h>
 #include <LibWeb/ServiceWorker/EventNames.h>
 #include <LibWeb/ServiceWorker/ServiceWorkerGlobalScope.h>
 
@@ -18,6 +19,13 @@ ServiceWorkerGlobalScope::ServiceWorkerGlobalScope(JS::Realm& realm, GC::Ref<Web
 {
 }
 
+void ServiceWorkerGlobalScope::visit_edges(Cell::Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+
+    visitor.visit(m_cookie_store);
+}
+
 // https://w3c.github.io/ServiceWorker/#dom-serviceworkerglobalscope-oninstall
 void ServiceWorkerGlobalScope::set_oninstall(GC::Ptr<WebIDL::CallbackType> value)
 {
@@ -78,4 +86,15 @@ GC::Ptr<WebIDL::CallbackType> ServiceWorkerGlobalScope::onmessageerror()
     return event_handler_attribute(EventNames::messageerror);
 }
 
+// https://cookiestore.spec.whatwg.org/#ServiceWorkerGlobalScope
+GC::Ref<CookieStore::CookieStore> ServiceWorkerGlobalScope::cookie_store()
+{
+    auto& realm = this->realm();
+
+    // The cookieStore getter steps are to return this’s associated CookieStore.
+    if (!m_cookie_store)
+        m_cookie_store = realm.create<CookieStore::CookieStore>(realm);
+    return *m_cookie_store;
+}
+
 }
diff --git a/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.h b/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.h
index cded63f2611..7c1472abc7d 100644
--- a/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.h
+++ b/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.h
@@ -33,8 +33,15 @@ public:
     void set_onmessageerror(GC::Ptr<WebIDL::CallbackType>);
     GC::Ptr<WebIDL::CallbackType> onmessageerror();
 
+    [[nodiscard]] GC::Ref<CookieStore::CookieStore> cookie_store();
+
 protected:
     explicit ServiceWorkerGlobalScope(JS::Realm&, GC::Ref<Web::Page>);
+
+private:
+    virtual void visit_edges(Cell::Visitor&) override;
+
+    GC::Ptr<CookieStore::CookieStore> m_cookie_store;
 };
 
 }
diff --git a/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.idl b/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.idl
index 74a599aec05..187491ebc2f 100644
--- a/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.idl
+++ b/Libraries/LibWeb/ServiceWorker/ServiceWorkerGlobalScope.idl
@@ -1,3 +1,4 @@
+#import <CookieStore/CookieStore.idl>
 #import <DOM/EventHandler.idl>
 
 // https://w3c.github.io/ServiceWorker/#serviceworkerglobalscope
diff --git a/Libraries/LibWeb/idl_files.cmake b/Libraries/LibWeb/idl_files.cmake
index 7c415dd9eab..311837c3ea6 100644
--- a/Libraries/LibWeb/idl_files.cmake
+++ b/Libraries/LibWeb/idl_files.cmake
@@ -13,6 +13,7 @@ libweb_js_bindings(Clipboard/ClipboardItem)
 libweb_js_bindings(ContentSecurityPolicy/SecurityPolicyViolationEvent)
 libweb_js_bindings(Compression/CompressionStream)
 libweb_js_bindings(Compression/DecompressionStream)
+libweb_js_bindings(CookieStore/CookieStore)
 libweb_js_bindings(CredentialManagement/Credential)
 libweb_js_bindings(CredentialManagement/CredentialsContainer)
 libweb_js_bindings(CredentialManagement/FederatedCredential)
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
index 32444f71bc3..6a91bc36a7f 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
@@ -4816,6 +4816,7 @@ static void generate_using_namespace_definitions(SourceGenerator& generator)
 using namespace Web::Animations;
 using namespace Web::Clipboard;
 using namespace Web::ContentSecurityPolicy;
+using namespace Web::CookieStore;
 using namespace Web::CredentialManagement;
 using namespace Web::Crypto;
 using namespace Web::CSS;
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h
index 1bcb7c4616e..01c3fcfaf15 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h
@@ -17,6 +17,7 @@ static constexpr Array libweb_interface_namespaces = {
     "Clipboard"sv,
     "Compression"sv,
     "ContentSecurityPolicy"sv,
+    "CookieStore"sv,
     "Crypto"sv,
     "DOM"sv,
     "DOMURL"sv,
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
index 4046f22a028..aca7872fc5a 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
@@ -333,6 +333,7 @@ shared_library("LibWeb") {
            "CSS",
            "Clipboard",
            "Cookie",
+           "CookieStore",
            "Crypto",
            "DOM",
            "DOMURL",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/CookieStore/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/CookieStore/BUILD.gn
new file mode 100644
index 00000000000..79ff6ce6f1a
--- /dev/null
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/CookieStore/BUILD.gn
@@ -0,0 +1,5 @@
+source_set("CookieStore") {
+  configs += [ "//Userland/Libraries/LibWeb:configs" ]
+  deps = [ "//Userland/Libraries/LibWeb:all_generated" ]
+  sources = [ "CookieStore.cpp" ]
+}
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
index e82f32e9952..141427aef59 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
@@ -30,6 +30,7 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/Animations/KeyframeEffect.idl",
   "//Userland/Libraries/LibWeb/Clipboard/Clipboard.idl",
   "//Userland/Libraries/LibWeb/Clipboard/ClipboardEvent.idl",
+  "//Userland/Libraries/LibWeb/CookieStore/CookieStore.idl",
   "//Userland/Libraries/LibWeb/Crypto/Crypto.idl",
   "//Userland/Libraries/LibWeb/Crypto/CryptoKey.idl",
   "//Userland/Libraries/LibWeb/Crypto/SubtleCrypto.idl",
diff --git a/Tests/LibWeb/Text/expected/all-window-properties.txt b/Tests/LibWeb/Text/expected/all-window-properties.txt
index 2559787d9d8..8e778ba5ccc 100644
--- a/Tests/LibWeb/Text/expected/all-window-properties.txt
+++ b/Tests/LibWeb/Text/expected/all-window-properties.txt
@@ -79,6 +79,7 @@ Comment
 CompositionEvent
 CompressionStream
 ConstantSourceNode
+CookieStore
 CountQueuingStrategy
 Credential
 CredentialsContainer