diff --git a/Libraries/LibHTML/DOM/HTMLLinkElement.cpp b/Libraries/LibHTML/DOM/HTMLLinkElement.cpp
index adf25d92aa..7e2c238e91 100644
--- a/Libraries/LibHTML/DOM/HTMLLinkElement.cpp
+++ b/Libraries/LibHTML/DOM/HTMLLinkElement.cpp
@@ -27,7 +27,7 @@ void HTMLLinkElement::inserted_into(Node&)
             return;
         }
         auto data = file->read_all();
-        auto sheet = parse_css(String::copy(data));
+        auto sheet = parse_css(data);
 
         if (!sheet) {
             dbg() << "Failed to parse " << url.to_string();
diff --git a/Libraries/LibHTML/HtmlView.cpp b/Libraries/LibHTML/HtmlView.cpp
index 8c42658512..1724b54114 100644
--- a/Libraries/LibHTML/HtmlView.cpp
+++ b/Libraries/LibHTML/HtmlView.cpp
@@ -178,7 +178,7 @@ void HtmlView::load(const URL& url)
         return;
     }
 
-    String html = String::copy(f->read_all());
+    auto html = f->read_all();
     auto document = parse_html(html, url);
     document->normalize();
 
diff --git a/Libraries/LibHTML/Parser/CSSParser.cpp b/Libraries/LibHTML/Parser/CSSParser.cpp
index e9e2ff939c..7b43b046ac 100644
--- a/Libraries/LibHTML/Parser/CSSParser.cpp
+++ b/Libraries/LibHTML/Parser/CSSParser.cpp
@@ -301,16 +301,16 @@ private:
 
     int index = 0;
 
-    String css;
+    StringView css;
 };
 
-NonnullRefPtr<StyleSheet> parse_css(const String& css)
+NonnullRefPtr<StyleSheet> parse_css(const StringView& css)
 {
     CSSParser parser(css);
     return parser.parse_sheet();
 }
 
-NonnullRefPtr<StyleDeclaration> parse_css_declaration(const String& css)
+NonnullRefPtr<StyleDeclaration> parse_css_declaration(const StringView& css)
 {
     CSSParser parser(css);
     return parser.parse_standalone_declaration();
diff --git a/Libraries/LibHTML/Parser/CSSParser.h b/Libraries/LibHTML/Parser/CSSParser.h
index 053e2fbde8..44e57f5dd5 100644
--- a/Libraries/LibHTML/Parser/CSSParser.h
+++ b/Libraries/LibHTML/Parser/CSSParser.h
@@ -3,6 +3,6 @@
 #include <AK/NonnullRefPtr.h>
 #include <LibHTML/CSS/StyleSheet.h>
 
-NonnullRefPtr<StyleSheet> parse_css(const String&);
-NonnullRefPtr<StyleDeclaration> parse_css_declaration(const String&);
+NonnullRefPtr<StyleSheet> parse_css(const StringView&);
+NonnullRefPtr<StyleDeclaration> parse_css_declaration(const StringView&);
 
diff --git a/Libraries/LibHTML/Parser/HTMLParser.cpp b/Libraries/LibHTML/Parser/HTMLParser.cpp
index 9593799576..d9fcde815e 100644
--- a/Libraries/LibHTML/Parser/HTMLParser.cpp
+++ b/Libraries/LibHTML/Parser/HTMLParser.cpp
@@ -57,7 +57,7 @@ static bool is_valid_in_attribute_name(char ch)
     return isalnum(ch) || ch == '_' || ch == '-';
 }
 
-static bool is_self_closing_tag(const String& tag_name)
+static bool is_self_closing_tag(const StringView& tag_name)
 {
     return tag_name == "area"
         || tag_name == "base"
@@ -75,7 +75,7 @@ static bool is_self_closing_tag(const String& tag_name)
         || tag_name == "wbr";
 }
 
-NonnullRefPtr<Document> parse_html(const String& html, const URL& url)
+NonnullRefPtr<Document> parse_html(const StringView& html, const URL& url)
 {
     NonnullRefPtrVector<ParentNode> node_stack;
 
diff --git a/Libraries/LibHTML/Parser/HTMLParser.h b/Libraries/LibHTML/Parser/HTMLParser.h
index eb57a42465..7e0bf177ab 100644
--- a/Libraries/LibHTML/Parser/HTMLParser.h
+++ b/Libraries/LibHTML/Parser/HTMLParser.h
@@ -3,5 +3,5 @@
 #include <AK/NonnullRefPtr.h>
 #include <LibHTML/DOM/Document.h>
 
-NonnullRefPtr<Document> parse_html(const String&, const URL& = URL());
+NonnullRefPtr<Document> parse_html(const StringView&, const URL& = URL());