diff --git a/Libraries/LibWeb/CMakeLists.txt b/Libraries/LibWeb/CMakeLists.txt
index c13c4f10df8..a29bf46f838 100644
--- a/Libraries/LibWeb/CMakeLists.txt
+++ b/Libraries/LibWeb/CMakeLists.txt
@@ -240,7 +240,6 @@ set(SOURCES
     DOM/TreeWalker.cpp
     DOM/Utils.cpp
     DOM/XMLDocument.cpp
-    DOMParsing/XMLSerializer.cpp
     DOMURL/DOMURL.cpp
     DOMURL/URLSearchParams.cpp
     DOMURL/URLSearchParamsIterator.cpp
@@ -536,6 +535,7 @@ set(SOURCES
     HTML/WorkerNavigator.cpp
     HTML/WorkletGlobalScope.cpp
     HTML/ValidityState.cpp
+    HTML/XMLSerializer.cpp
     HighResolutionTime/Performance.cpp
     HighResolutionTime/TimeOrigin.cpp
     Infra/ByteSequences.cpp
diff --git a/Libraries/LibWeb/DOM/Element.cpp b/Libraries/LibWeb/DOM/Element.cpp
index 0dd01b1f98e..a3f202c3f2f 100644
--- a/Libraries/LibWeb/DOM/Element.cpp
+++ b/Libraries/LibWeb/DOM/Element.cpp
@@ -865,7 +865,7 @@ WebIDL::ExceptionOr<void> Element::set_inner_html(StringView value)
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-element-innerhtml
 WebIDL::ExceptionOr<String> Element::inner_html() const
 {
-    return serialize_fragment(DOMParsing::RequireWellFormed::Yes);
+    return serialize_fragment(HTML::RequireWellFormed::Yes);
 }
 
 bool Element::is_focused() const
@@ -1768,7 +1768,7 @@ WebIDL::ExceptionOr<GC::Ref<DOM::DocumentFragment>> Element::parse_fragment(Stri
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-element-outerhtml
 WebIDL::ExceptionOr<String> Element::outer_html() const
 {
-    return serialize_fragment(DOMParsing::RequireWellFormed::Yes, FragmentSerializationMode::Outer);
+    return serialize_fragment(HTML::RequireWellFormed::Yes, FragmentSerializationMode::Outer);
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-element-outerhtml
diff --git a/Libraries/LibWeb/DOM/Node.cpp b/Libraries/LibWeb/DOM/Node.cpp
index 626150547fe..f5d0b1e2124 100644
--- a/Libraries/LibWeb/DOM/Node.cpp
+++ b/Libraries/LibWeb/DOM/Node.cpp
@@ -1815,7 +1815,7 @@ void Node::string_replace_all(String const& string)
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#fragment-serializing-algorithm-steps
-WebIDL::ExceptionOr<String> Node::serialize_fragment(DOMParsing::RequireWellFormed require_well_formed, FragmentSerializationMode fragment_serialization_mode) const
+WebIDL::ExceptionOr<String> Node::serialize_fragment(HTML::RequireWellFormed require_well_formed, FragmentSerializationMode fragment_serialization_mode) const
 {
     // 1. Let context document be the value of node's node document.
     auto const& context_document = document();
@@ -1830,12 +1830,12 @@ WebIDL::ExceptionOr<String> Node::serialize_fragment(DOMParsing::RequireWellForm
     if (fragment_serialization_mode == FragmentSerializationMode::Inner) {
         StringBuilder markup;
         for (auto* child = first_child(); child; child = child->next_sibling()) {
-            auto child_markup = TRY(DOMParsing::serialize_node_to_xml_string(*child, require_well_formed));
+            auto child_markup = TRY(HTML::serialize_node_to_xml_string(*child, require_well_formed));
             markup.append(child_markup.bytes_as_string_view());
         }
         return MUST(markup.to_string());
     }
-    return DOMParsing::serialize_node_to_xml_string(*this, require_well_formed);
+    return HTML::serialize_node_to_xml_string(*this, require_well_formed);
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#unsafely-set-html
diff --git a/Libraries/LibWeb/DOM/Node.h b/Libraries/LibWeb/DOM/Node.h
index f659cd5333d..34d302a469d 100644
--- a/Libraries/LibWeb/DOM/Node.h
+++ b/Libraries/LibWeb/DOM/Node.h
@@ -17,7 +17,7 @@
 #include <LibWeb/DOM/EventTarget.h>
 #include <LibWeb/DOM/NodeType.h>
 #include <LibWeb/DOM/Slottable.h>
-#include <LibWeb/DOMParsing/XMLSerializer.h>
+#include <LibWeb/HTML/XMLSerializer.h>
 #include <LibWeb/TraversalDecision.h>
 #include <LibWeb/TreeNode.h>
 #include <LibWeb/WebIDL/ExceptionOr.h>
@@ -329,7 +329,7 @@ public:
     [[nodiscard]] UniqueNodeID unique_id() const { return m_unique_id; }
     static Node* from_unique_id(UniqueNodeID);
 
-    WebIDL::ExceptionOr<String> serialize_fragment(DOMParsing::RequireWellFormed, FragmentSerializationMode = FragmentSerializationMode::Inner) const;
+    WebIDL::ExceptionOr<String> serialize_fragment(HTML::RequireWellFormed, FragmentSerializationMode = FragmentSerializationMode::Inner) const;
 
     WebIDL::ExceptionOr<void> unsafely_set_html(Element&, StringView);
 
diff --git a/Libraries/LibWeb/DOM/ShadowRoot.cpp b/Libraries/LibWeb/DOM/ShadowRoot.cpp
index e9acb7716bc..6e6b19f47ad 100644
--- a/Libraries/LibWeb/DOM/ShadowRoot.cpp
+++ b/Libraries/LibWeb/DOM/ShadowRoot.cpp
@@ -64,7 +64,7 @@ EventTarget* ShadowRoot::get_parent(Event const& event)
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-shadowroot-innerhtml
 WebIDL::ExceptionOr<String> ShadowRoot::inner_html() const
 {
-    return serialize_fragment(DOMParsing::RequireWellFormed::Yes);
+    return serialize_fragment(HTML::RequireWellFormed::Yes);
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-shadowroot-innerhtml
diff --git a/Libraries/LibWeb/Forward.h b/Libraries/LibWeb/Forward.h
index a3546223bf7..42670e156de 100644
--- a/Libraries/LibWeb/Forward.h
+++ b/Libraries/LibWeb/Forward.h
@@ -339,10 +339,6 @@ struct AddEventListenerOptions;
 struct EventListenerOptions;
 }
 
-namespace Web::DOMParsing {
-class XMLSerializer;
-}
-
 namespace Web::Encoding {
 class TextDecoder;
 class TextEncoder;
@@ -579,6 +575,7 @@ class WorkerEnvironmentSettingsObject;
 class WorkerGlobalScope;
 class WorkerLocation;
 class WorkerNavigator;
+class XMLSerializer;
 
 enum class AllowMultipleFiles;
 enum class MediaSeekMode;
diff --git a/Libraries/LibWeb/DOMParsing/XMLSerializer.cpp b/Libraries/LibWeb/HTML/XMLSerializer.cpp
similarity index 99%
rename from Libraries/LibWeb/DOMParsing/XMLSerializer.cpp
rename to Libraries/LibWeb/HTML/XMLSerializer.cpp
index 7b9a9c7100c..6cb9546aa00 100644
--- a/Libraries/LibWeb/DOMParsing/XMLSerializer.cpp
+++ b/Libraries/LibWeb/HTML/XMLSerializer.cpp
@@ -16,13 +16,13 @@
 #include <LibWeb/DOM/Node.h>
 #include <LibWeb/DOM/ProcessingInstruction.h>
 #include <LibWeb/DOM/Text.h>
-#include <LibWeb/DOMParsing/XMLSerializer.h>
 #include <LibWeb/HTML/HTMLTemplateElement.h>
+#include <LibWeb/HTML/XMLSerializer.h>
 #include <LibWeb/Infra/Strings.h>
 #include <LibWeb/Namespace.h>
 #include <LibWeb/WebIDL/ExceptionOr.h>
 
-namespace Web::DOMParsing {
+namespace Web::HTML {
 
 GC_DEFINE_ALLOCATOR(XMLSerializer);
 
@@ -44,10 +44,12 @@ void XMLSerializer::initialize(JS::Realm& realm)
     WEB_SET_PROTOTYPE_FOR_INTERFACE(XMLSerializer);
 }
 
-// https://w3c.github.io/DOM-Parsing/#dom-xmlserializer-serializetostring
+// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-xmlserializer-serializetostring
 WebIDL::ExceptionOr<String> XMLSerializer::serialize_to_string(GC::Ref<DOM::Node const> root)
 {
-    // The serializeToString(root) method must produce an XML serialization of root passing a value of false for the require well-formed parameter, and return the result.
+    // The serializeToString(root) method steps are:
+
+    // 1. Return the XML serialization of root given false.
     return serialize_node_to_xml_string(root, RequireWellFormed::No);
 }
 
diff --git a/Libraries/LibWeb/DOMParsing/XMLSerializer.h b/Libraries/LibWeb/HTML/XMLSerializer.h
similarity index 88%
rename from Libraries/LibWeb/DOMParsing/XMLSerializer.h
rename to Libraries/LibWeb/HTML/XMLSerializer.h
index 16be0bdb255..6a52b89a962 100644
--- a/Libraries/LibWeb/DOMParsing/XMLSerializer.h
+++ b/Libraries/LibWeb/HTML/XMLSerializer.h
@@ -8,8 +8,9 @@
 
 #include <LibWeb/Bindings/PlatformObject.h>
 
-namespace Web::DOMParsing {
+namespace Web::HTML {
 
+// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#xmlserializer
 class XMLSerializer final : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(XMLSerializer, Bindings::PlatformObject);
     GC_DECLARE_ALLOCATOR(XMLSerializer);
diff --git a/Libraries/LibWeb/DOMParsing/XMLSerializer.idl b/Libraries/LibWeb/HTML/XMLSerializer.idl
similarity index 60%
rename from Libraries/LibWeb/DOMParsing/XMLSerializer.idl
rename to Libraries/LibWeb/HTML/XMLSerializer.idl
index 5799ffbf71c..020df4de127 100644
--- a/Libraries/LibWeb/DOMParsing/XMLSerializer.idl
+++ b/Libraries/LibWeb/HTML/XMLSerializer.idl
@@ -1,6 +1,6 @@
 #import <DOM/Node.idl>
 
-// https://w3c.github.io/DOM-Parsing/#the-xmlserializer-interface
+// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#xmlserializer
 [Exposed=Window]
 interface XMLSerializer {
     constructor();
diff --git a/Libraries/LibWeb/XHR/XMLHttpRequest.cpp b/Libraries/LibWeb/XHR/XMLHttpRequest.cpp
index e28aba712ad..0ac835511a1 100644
--- a/Libraries/LibWeb/XHR/XMLHttpRequest.cpp
+++ b/Libraries/LibWeb/XHR/XMLHttpRequest.cpp
@@ -573,7 +573,7 @@ WebIDL::ExceptionOr<void> XMLHttpRequest::send(Optional<DocumentOrXMLHttpRequest
 
         // 2. If body is a Document, then set this’s request body to body, serialized, converted, and UTF-8 encoded.
         if (body->has<GC::Root<DOM::Document>>()) {
-            auto string_serialized_document = TRY(body->get<GC::Root<DOM::Document>>().cell()->serialize_fragment(DOMParsing::RequireWellFormed::No));
+            auto string_serialized_document = TRY(body->get<GC::Root<DOM::Document>>().cell()->serialize_fragment(HTML::RequireWellFormed::No));
             m_request_body = Fetch::Infrastructure::byte_sequence_as_body(realm, string_serialized_document.bytes());
         }
         // 3. Otherwise:
diff --git a/Libraries/LibWeb/idl_files.cmake b/Libraries/LibWeb/idl_files.cmake
index 65c596f03ad..ddb5f80c20c 100644
--- a/Libraries/LibWeb/idl_files.cmake
+++ b/Libraries/LibWeb/idl_files.cmake
@@ -83,7 +83,6 @@ libweb_js_bindings(DOM/StaticRange)
 libweb_js_bindings(DOM/Text)
 libweb_js_bindings(DOM/TreeWalker)
 libweb_js_bindings(DOM/XMLDocument)
-libweb_js_bindings(DOMParsing/XMLSerializer)
 libweb_js_bindings(DOMURL/DOMURL)
 libweb_js_bindings(DOMURL/URLSearchParams ITERABLE)
 libweb_js_bindings(Encoding/TextDecoder)
@@ -251,6 +250,7 @@ libweb_js_bindings(HTML/WorkerGlobalScope)
 libweb_js_bindings(HTML/WorkerLocation)
 libweb_js_bindings(HTML/WorkerNavigator)
 libweb_js_bindings(HTML/WorkletGlobalScope)
+libweb_js_bindings(HTML/XMLSerializer)
 libweb_js_bindings(HighResolutionTime/Performance)
 libweb_js_bindings(IndexedDB/IDBCursor)
 libweb_js_bindings(IndexedDB/IDBDatabase)
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
index 4ec2bf06ee4..5bd5b219c89 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
@@ -4505,7 +4505,6 @@ using namespace Web::CredentialManagement;
 using namespace Web::Crypto;
 using namespace Web::CSS;
 using namespace Web::DOM;
-using namespace Web::DOMParsing;
 using namespace Web::DOMURL;
 using namespace Web::Encoding;
 using namespace Web::EntriesAPI;
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h
index 3bcd63c8cb0..fce40c45351 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/Namespaces.h
@@ -18,7 +18,6 @@ static constexpr Array libweb_interface_namespaces = {
     "Compression"sv,
     "Crypto"sv,
     "DOM"sv,
-    "DOMParsing"sv,
     "DOMURL"sv,
     "Encoding"sv,
     "Fetch"sv,
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
index b3a5f2b0709..fe62e177f65 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
@@ -301,7 +301,6 @@ shared_library("LibWeb") {
            "Cookie",
            "Crypto",
            "DOM",
-           "DOMParsing",
            "DOMURL",
            "Encoding",
            "EntriesAPI",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/DOMParsing/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/DOMParsing/BUILD.gn
deleted file mode 100644
index a6f354cf21f..00000000000
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/DOMParsing/BUILD.gn
+++ /dev/null
@@ -1,5 +0,0 @@
-source_set("DOMParsing") {
-  configs += [ "//Userland/Libraries/LibWeb:configs" ]
-  deps = [ "//Userland/Libraries/LibWeb:all_generated" ]
-  sources = [ "XMLSerializer.cpp" ]
-}
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn
index 12d37d983fb..11c591ab194 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn
@@ -205,5 +205,6 @@ source_set("HTML") {
     "WorkerGlobalScope.cpp",
     "WorkerLocation.cpp",
     "WorkerNavigator.cpp",
+    "XMLSerializer.cpp"
   ]
 }
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
index 8e98b735e3a..2a80b1bf467 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
@@ -94,7 +94,6 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/DOM/Text.idl",
   "//Userland/Libraries/LibWeb/DOM/TreeWalker.idl",
   "//Userland/Libraries/LibWeb/DOM/XMLDocument.idl",
-  "//Userland/Libraries/LibWeb/DOMParsing/XMLSerializer.idl",
   "//Userland/Libraries/LibWeb/DOMURL/DOMURL.idl",
   "//Userland/Libraries/LibWeb/Encoding/TextDecoder.idl",
   "//Userland/Libraries/LibWeb/Encoding/TextEncoder.idl",
@@ -258,6 +257,7 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/HTML/WorkerGlobalScope.idl",
   "//Userland/Libraries/LibWeb/HTML/WorkerLocation.idl",
   "//Userland/Libraries/LibWeb/HTML/WorkerNavigator.idl",
+  "//Userland/Libraries/LibWeb/HTML/XMLSerializer.idl",
   "//Userland/Libraries/LibWeb/IndexedDB/IDBFactory.idl",
   "//Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.idl",
   "//Userland/Libraries/LibWeb/IndexedDB/IDBRequest.idl",
diff --git a/Services/WebContent/WebDriverConnection.cpp b/Services/WebContent/WebDriverConnection.cpp
index f46a35f5da4..a2c89b0cfcc 100644
--- a/Services/WebContent/WebDriverConnection.cpp
+++ b/Services/WebContent/WebDriverConnection.cpp
@@ -2033,13 +2033,13 @@ Messages::WebDriverClient::GetSourceResponse WebDriverConnection::get_source()
         // 3. Let source be the result of invoking the fragment serializing algorithm on a fictional node whose only
         //    child is the document element providing true for the require well-formed flag. If this causes an exception
         //    to be thrown, let source be null.
-        if (auto result = document->document_element()->serialize_fragment(Web::DOMParsing::RequireWellFormed::Yes, Web::DOM::FragmentSerializationMode::Outer); !result.is_error())
+        if (auto result = document->document_element()->serialize_fragment(Web::HTML::RequireWellFormed::Yes, Web::DOM::FragmentSerializationMode::Outer); !result.is_error())
             source = result.release_value();
 
         // 4. Let source be the result of serializing to string session's current browsing context's active document,
         //    if source is null.
         if (!source.has_value())
-            source = MUST(document->serialize_fragment(Web::DOMParsing::RequireWellFormed::No));
+            source = MUST(document->serialize_fragment(Web::HTML::RequireWellFormed::No));
 
         // 5. Return success with data source.
         async_driver_execution_complete({ source.release_value() });