diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 97fe9cc18f..f2f08f0802 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -720,7 +720,7 @@ DeprecatedString Document::title() const
     //    element that is a child of the document element.
     if (auto const* document_element = this->document_element(); is<SVG::SVGElement>(document_element)) {
         if (auto const* title_element = document_element->first_child_of_type<SVG::SVGTitleElement>())
-            value = title_element->child_text_content();
+            value = title_element->child_text_content().to_deprecated_string();
     }
 
     // 2. Otherwise, let value be the child text content of the title element, or the empty string if the title element
@@ -761,7 +761,7 @@ WebIDL::ExceptionOr<void> Document::set_title(String const& title)
         }
 
         // 3. String replace all with the given value within element.
-        element->string_replace_all(title.to_deprecated_string());
+        element->string_replace_all(title);
     }
 
     // -> If the document element is in the HTML namespace
@@ -790,7 +790,7 @@ WebIDL::ExceptionOr<void> Document::set_title(String const& title)
         }
 
         // 4. String replace all with the given value within element.
-        element->string_replace_all(title.to_deprecated_string());
+        element->string_replace_all(title);
     }
 
     // -> Otherwise
diff --git a/Userland/Libraries/LibWeb/DOM/Node.cpp b/Userland/Libraries/LibWeb/DOM/Node.cpp
index 6166a28929..609d4467b3 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Node.cpp
@@ -179,7 +179,7 @@ void Node::set_text_content(Optional<String> const& maybe_content)
 {
     // The textContent setter steps are to, if the given value is null, act as if it was the empty string instead,
     // and then do as described below, switching on the interface this implements:
-    auto content = maybe_content.value_or(String {}).to_deprecated_string();
+    auto content = maybe_content.value_or(String {});
 
     // If DocumentFragment or Element, string replace all with the given value within this.
     if (is<DocumentFragment>(this) || is<Element>(this)) {
@@ -190,7 +190,7 @@ void Node::set_text_content(Optional<String> const& maybe_content)
     else if (is<CharacterData>(this)) {
 
         auto* character_data_node = verify_cast<CharacterData>(this);
-        character_data_node->set_data(MUST(String::from_deprecated_string(content)));
+        character_data_node->set_data(content);
 
         // FIXME: CharacterData::set_data is not spec compliant. Make this match the spec when set_data becomes spec compliant.
         //        Do note that this will make this function able to throw an exception.
@@ -198,7 +198,7 @@ void Node::set_text_content(Optional<String> const& maybe_content)
 
     // If Attr, set an existing attribute value with this and the given value.
     if (is<Attr>(*this)) {
-        static_cast<Attr&>(*this).set_value(MUST(String::from_deprecated_string(content)));
+        static_cast<Attr&>(*this).set_value(content);
     }
 
     // Otherwise, do nothing.
@@ -278,10 +278,10 @@ void Node::invalidate_style()
     document().schedule_style_update();
 }
 
-DeprecatedString Node::child_text_content() const
+String Node::child_text_content() const
 {
     if (!is<ParentNode>(*this))
-        return DeprecatedString::empty();
+        return String {};
 
     StringBuilder builder;
     verify_cast<ParentNode>(*this).for_each_child([&](auto& child) {
@@ -291,7 +291,7 @@ DeprecatedString Node::child_text_content() const
                 builder.append(maybe_content.value());
         }
     });
-    return builder.to_deprecated_string();
+    return MUST(builder.to_string());
 }
 
 // https://dom.spec.whatwg.org/#concept-tree-root
@@ -1316,14 +1316,14 @@ void Node::replace_all(JS::GCPtr<Node> node)
 }
 
 // https://dom.spec.whatwg.org/#string-replace-all
-void Node::string_replace_all(DeprecatedString const& string)
+void Node::string_replace_all(String const& string)
 {
     // 1. Let node be null.
     JS::GCPtr<Node> node;
 
     // 2. If string is not the empty string, then set node to a new Text node whose data is string and node document is parent’s node document.
     if (!string.is_empty())
-        node = heap().allocate<Text>(realm(), document(), MUST(String::from_deprecated_string(string)));
+        node = heap().allocate<Text>(realm(), document(), string);
 
     // 3. Replace all with node within parent.
     replace_all(node);
@@ -1471,18 +1471,18 @@ JS::NonnullGCPtr<Node> Node::get_root_node(GetRootNodeOptions const& options)
     return root();
 }
 
-DeprecatedString Node::debug_description() const
+String Node::debug_description() const
 {
     StringBuilder builder;
     builder.append(node_name().to_deprecated_fly_string().to_lowercase());
     if (is_element()) {
-        auto& element = static_cast<DOM::Element const&>(*this);
+        auto const& element = static_cast<DOM::Element const&>(*this);
         if (auto id = element.get_attribute(HTML::AttributeNames::id); id.has_value())
             builder.appendff("#{}", id.value());
         for (auto const& class_name : element.class_names())
             builder.appendff(".{}", class_name);
     }
-    return builder.to_deprecated_string();
+    return MUST(builder.to_string());
 }
 
 // https://dom.spec.whatwg.org/#concept-node-length
@@ -1935,9 +1935,9 @@ ErrorOr<String> Node::accessible_description(Document const& document) const
     return builder.to_string();
 }
 
-Optional<StringView> Node::first_valid_id(DeprecatedString const& value, Document const& document)
+Optional<StringView> Node::first_valid_id(StringView value, Document const& document)
 {
-    auto id_list = value.split_view(Infra::is_ascii_whitespace);
+    auto id_list = value.split_view_if(Infra::is_ascii_whitespace);
     for (auto const& id : id_list) {
         if (document.get_element_by_id(MUST(FlyString::from_utf8(id))))
             return id;
diff --git a/Userland/Libraries/LibWeb/DOM/Node.h b/Userland/Libraries/LibWeb/DOM/Node.h
index 8710426dbe..74402a1ec6 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.h
+++ b/Userland/Libraries/LibWeb/DOM/Node.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <AK/Badge.h>
-#include <AK/DeprecatedString.h>
 #include <AK/FlyString.h>
 #include <AK/JsonObjectSerializer.h>
 #include <AK/RefPtr.h>
@@ -161,7 +160,7 @@ public:
     const HTML::HTMLElement* enclosing_html_element() const;
     const HTML::HTMLElement* enclosing_html_element_with_attribute(FlyString const&) const;
 
-    DeprecatedString child_text_content() const;
+    String child_text_content() const;
 
     Node& root();
     Node const& root() const
@@ -242,7 +241,7 @@ public:
     WebIDL::ExceptionOr<String> serialize_fragment(DOMParsing::RequireWellFormed) const;
 
     void replace_all(JS::GCPtr<Node>);
-    void string_replace_all(DeprecatedString const&);
+    void string_replace_all(String const&);
 
     bool is_same_node(Node const*) const;
     bool is_equal_node(Node const*) const;
@@ -251,7 +250,7 @@ public:
 
     bool is_uninteresting_whitespace_node() const;
 
-    DeprecatedString debug_description() const;
+    String debug_description() const;
 
     size_t length() const;
 
@@ -707,7 +706,7 @@ private:
     void append_child_impl(JS::NonnullGCPtr<Node>);
     void remove_child_impl(JS::NonnullGCPtr<Node>);
 
-    static Optional<StringView> first_valid_id(DeprecatedString const&, Document const&);
+    static Optional<StringView> first_valid_id(StringView, Document const&);
     static ErrorOr<void> append_without_space(StringBuilder, StringView const&);
     static ErrorOr<void> append_with_space(StringBuilder, StringView const&);
     static ErrorOr<void> prepend_without_space(StringBuilder, StringView const&);
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
index 64c6c71931..aa72028b9f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp
@@ -114,7 +114,7 @@ String HTMLAnchorElement::text() const
 void HTMLAnchorElement::set_text(String const& text)
 {
     // The text attribute's setter must string replace all with the given value within this element.
-    string_replace_all(text.to_deprecated_string());
+    string_replace_all(text);
 }
 
 // https://html.spec.whatwg.org/multipage/text-level-semantics.html#dom-a-referrerpolicy
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp
index 5b23ea8384..122c01685b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp
@@ -106,7 +106,7 @@ String HTMLOptionElement::text() const
 // https://html.spec.whatwg.org/multipage/form-elements.html#dom-option-text
 void HTMLOptionElement::set_text(String const& text)
 {
-    string_replace_all(text.to_deprecated_string());
+    string_replace_all(text);
 }
 
 // https://html.spec.whatwg.org/multipage/form-elements.html#concept-option-index
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
index 3bdac45d09..1e273fcf6a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
@@ -429,7 +429,7 @@ void HTMLScriptElement::prepare_script()
 
             // 2. Fetch an inline module script graph, given source text, base URL, settings object, options, and with the following steps given result:
             // FIXME: Pass options
-            fetch_inline_module_script_graph(realm(), m_document->url().to_deprecated_string(), source_text, base_url, document().relevant_settings_object(), steps);
+            fetch_inline_module_script_graph(realm(), m_document->url().to_deprecated_string(), source_text.to_deprecated_string(), base_url, document().relevant_settings_object(), steps);
         }
         // -> "importmap"
         else if (m_script_type == ScriptType::ImportMap) {
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp
index b60caf47f0..d8b046805c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTitleElement.cpp
@@ -38,14 +38,14 @@ void HTMLTitleElement::children_changed()
 DeprecatedString HTMLTitleElement::text()
 {
     // The text attribute's getter must return this title element's child text content.
-    return child_text_content();
+    return child_text_content().to_deprecated_string();
 }
 
 // https://html.spec.whatwg.org/multipage/semantics.html#dom-title-text
 void HTMLTitleElement::set_text(String const& value)
 {
     // The text attribute's setter must string replace all with the given value within this title element.
-    string_replace_all(value.to_deprecated_string());
+    string_replace_all(value);
 }
 
 }
diff --git a/Userland/Libraries/LibWeb/SVG/SVGTextContentElement.cpp b/Userland/Libraries/LibWeb/SVG/SVGTextContentElement.cpp
index df177aaf1e..060d6c917f 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGTextContentElement.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGTextContentElement.cpp
@@ -47,7 +47,7 @@ Optional<TextAnchor> SVGTextContentElement::text_anchor() const
 
 DeprecatedString SVGTextContentElement::text_contents() const
 {
-    return child_text_content().trim_whitespace();
+    return child_text_content().to_deprecated_string().trim_whitespace();
 }
 
 // https://svgwg.org/svg2-draft/text.html#__svg__SVGTextContentElement__getNumberOfChars