diff --git a/Libraries/LibWeb/CSS/Length.h b/Libraries/LibWeb/CSS/Length.h
index ff1d2897b0..bce76a059c 100644
--- a/Libraries/LibWeb/CSS/Length.h
+++ b/Libraries/LibWeb/CSS/Length.h
@@ -151,7 +151,7 @@ public:
     {
         if (is_auto())
             return "[auto]";
-        return String::format("[%g %s]", m_value, unit_name());
+        return String::formatted("[{} {}]", m_value, unit_name());
     }
 
     bool operator==(const Length& other) const
diff --git a/Libraries/LibWeb/CSS/StyleValue.h b/Libraries/LibWeb/CSS/StyleValue.h
index c0d66f731c..7b3ee54f6c 100644
--- a/Libraries/LibWeb/CSS/StyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValue.h
@@ -329,7 +329,7 @@ public:
     static NonnullRefPtr<ImageStyleValue> create(const URL& url, DOM::Document& document) { return adopt(*new ImageStyleValue(url, document)); }
     virtual ~ImageStyleValue() override { }
 
-    String to_string() const override { return String::format("Image{%s}", m_url.to_string().characters()); }
+    String to_string() const override { return String::formatted("Image({})", m_url.to_string()); }
 
     const Gfx::Bitmap* bitmap() const { return m_bitmap; }
 
diff --git a/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp b/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp
index 646987d783..45e05776a6 100644
--- a/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp
+++ b/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp
@@ -227,8 +227,8 @@ static OwnPtr<Interface> parse_interface(StringView filename, const StringView&
         attribute.unsigned_ = unsigned_;
         attribute.type = type;
         attribute.name = name;
-        attribute.getter_callback_name = String::format("%s_getter", snake_name(attribute.name).characters());
-        attribute.setter_callback_name = String::format("%s_setter", snake_name(attribute.name).characters());
+        attribute.getter_callback_name = String::formatted("{}_getter", snake_name(attribute.name));
+        attribute.setter_callback_name = String::formatted("{}_setter", snake_name(attribute.name));
         attribute.extended_attributes = move(extended_attributes);
         interface->attributes.append(move(attribute));
     };
@@ -306,8 +306,8 @@ static OwnPtr<Interface> parse_interface(StringView filename, const StringView&
         parse_function(extended_attributes);
     }
 
-    interface->wrapper_class = String::format("%sWrapper", interface->name.characters());
-    interface->wrapper_base_class = String::format("%sWrapper", interface->parent_name.is_empty() ? "" : interface->parent_name.characters());
+    interface->wrapper_class = String::formatted("{}Wrapper", interface->name);
+    interface->wrapper_base_class = String::formatted("{}Wrapper", interface->parent_name.is_empty() ? String::empty() : interface->parent_name);
 
     return interface;
 }
diff --git a/Libraries/LibWeb/DOMTreeModel.cpp b/Libraries/LibWeb/DOMTreeModel.cpp
index c8c6a43ce2..76c0e39769 100644
--- a/Libraries/LibWeb/DOMTreeModel.cpp
+++ b/Libraries/LibWeb/DOMTreeModel.cpp
@@ -130,7 +130,7 @@ GUI::Variant DOMTreeModel::data(const GUI::ModelIndex& index, GUI::ModelRole rol
     }
     if (role == GUI::ModelRole::Display) {
         if (node.is_text())
-            return String::format("%s", with_whitespace_collapsed(downcast<DOM::Text>(node).data()).characters());
+            return with_whitespace_collapsed(downcast<DOM::Text>(node).data());
         if (!node.is_element())
             return node.node_name();
         auto& element = downcast<DOM::Element>(node);
diff --git a/Libraries/LibWeb/HTML/Parser/HTMLToken.cpp b/Libraries/LibWeb/HTML/Parser/HTMLToken.cpp
index aa9f33c35e..53a2357be5 100644
--- a/Libraries/LibWeb/HTML/Parser/HTMLToken.cpp
+++ b/Libraries/LibWeb/HTML/Parser/HTMLToken.cpp
@@ -78,9 +78,6 @@ String HTMLToken::to_string() const
     }
 
     return builder.to_string();
-
-    //dbg() << "[" << String::format("%42s", state_name(m_state)) << "] " << builder.to_string();
-    //m_current_token = {};
 }
 
 }
diff --git a/Libraries/LibWeb/LayoutTreeModel.cpp b/Libraries/LibWeb/LayoutTreeModel.cpp
index 02d3850509..440b2fce52 100644
--- a/Libraries/LibWeb/LayoutTreeModel.cpp
+++ b/Libraries/LibWeb/LayoutTreeModel.cpp
@@ -128,7 +128,7 @@ GUI::Variant LayoutTreeModel::data(const GUI::ModelIndex& index, GUI::ModelRole
     }
     if (role == GUI::ModelRole::Display) {
         if (is<Layout::TextNode>(node))
-            return String::format("TextNode: %s", with_whitespace_collapsed(downcast<Layout::TextNode>(node).text_for_rendering()).characters());
+            return String::formatted("TextNode: {}", with_whitespace_collapsed(downcast<Layout::TextNode>(node).text_for_rendering()));
         StringBuilder builder;
         builder.append(node.class_name());
         builder.append(' ');
diff --git a/Libraries/LibWeb/Loader/ResourceLoader.cpp b/Libraries/LibWeb/Loader/ResourceLoader.cpp
index 30611c579d..7f278247f9 100644
--- a/Libraries/LibWeb/Loader/ResourceLoader.cpp
+++ b/Libraries/LibWeb/Loader/ResourceLoader.cpp
@@ -173,7 +173,7 @@ void ResourceLoader::load(const LoadRequest& request, Function<void(ReadonlyByte
         download->on_buffered_download_finish = [this, success_callback = move(success_callback), error_callback = move(error_callback), download](bool success, auto, auto& response_headers, auto status_code, ReadonlyBytes payload) {
             if (status_code.has_value() && status_code.value() >= 400 && status_code.value() <= 499) {
                 if (error_callback)
-                    error_callback(String::format("HTTP error (%u)", status_code.value()));
+                    error_callback(String::formatted("HTTP error ({})", status_code.value()));
                 return;
             }
             --m_pending_loads;
@@ -201,7 +201,7 @@ void ResourceLoader::load(const LoadRequest& request, Function<void(ReadonlyByte
     }
 
     if (error_callback)
-        error_callback(String::format("Protocol not implemented: %s", url.protocol().characters()));
+        error_callback(String::formatted("Protocol not implemented: {}", url.protocol()));
 }
 
 void ResourceLoader::load(const URL& url, Function<void(ReadonlyBytes, const HashMap<String, String, CaseInsensitiveStringTraits>& response_headers)> success_callback, Function<void(const String&)> error_callback)