diff --git a/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.cpp b/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.cpp
index d30bd5e8de..5768a8dd68 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.cpp
@@ -34,17 +34,17 @@ DeprecatedString ComponentValue::to_deprecated_string() const
         [](NonnullRefPtr<Function> const& function) { return function->to_deprecated_string(); });
 }
 
-DeprecatedString ComponentValue::to_debug_string() const
+ErrorOr<String> ComponentValue::to_debug_string() const
 {
     return m_value.visit(
-        [](Token const& token) {
-            return DeprecatedString::formatted("Token: {}", token.to_debug_string());
+        [](Token const& token) -> ErrorOr<String> {
+            return String::formatted("Token: {}", TRY(token.to_debug_string()));
         },
-        [](NonnullRefPtr<Block> const& block) {
-            return DeprecatedString::formatted("Block: {}", block->to_deprecated_string());
+        [](NonnullRefPtr<Block> const& block) -> ErrorOr<String> {
+            return String::formatted("Block: {}", block->to_deprecated_string());
         },
-        [](NonnullRefPtr<Function> const& function) {
-            return DeprecatedString::formatted("Function: {}", function->to_deprecated_string());
+        [](NonnullRefPtr<Function> const& function) -> ErrorOr<String> {
+            return String::formatted("Function: {}", function->to_deprecated_string());
         });
 }
 
diff --git a/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h b/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h
index 4ad73f7028..8bec23ad22 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h
+++ b/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h
@@ -34,7 +34,7 @@ public:
     operator Token() const { return m_value.get<Token>(); }
 
     DeprecatedString to_deprecated_string() const;
-    DeprecatedString to_debug_string() const;
+    ErrorOr<String> to_debug_string() const;
 
 private:
     Variant<Token, NonnullRefPtr<Function>, NonnullRefPtr<Block>> m_value;
diff --git a/Userland/Libraries/LibWeb/CSS/Parser/Token.cpp b/Userland/Libraries/LibWeb/CSS/Parser/Token.cpp
index 88e2f68c56..c4c16581fd 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/Token.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Parser/Token.cpp
@@ -79,62 +79,62 @@ DeprecatedString Token::to_deprecated_string() const
     }
 }
 
-DeprecatedString Token::to_debug_string() const
+ErrorOr<String> Token::to_debug_string() const
 {
     switch (m_type) {
     case Type::Invalid:
         VERIFY_NOT_REACHED();
 
     case Type::EndOfFile:
-        return "__EOF__";
+        return String::from_utf8("__EOF__"sv);
     case Type::Ident:
-        return DeprecatedString::formatted("Ident: {}", ident());
+        return String::formatted("Ident: {}", ident());
     case Type::Function:
-        return DeprecatedString::formatted("Function: {}", function());
+        return String::formatted("Function: {}", function());
     case Type::AtKeyword:
-        return DeprecatedString::formatted("AtKeyword: {}", at_keyword());
+        return String::formatted("AtKeyword: {}", at_keyword());
     case Type::Hash:
-        return DeprecatedString::formatted("Hash: {} (hash_type: {})", hash_value(), m_hash_type == HashType::Unrestricted ? "Unrestricted" : "Id");
+        return String::formatted("Hash: {} (hash_type: {})", hash_value(), m_hash_type == HashType::Unrestricted ? "Unrestricted" : "Id");
     case Type::String:
-        return DeprecatedString::formatted("String: {}", string());
+        return String::formatted("String: {}", string());
     case Type::BadString:
-        return "BadString";
+        return String::from_utf8("BadString"sv);
     case Type::Url:
-        return DeprecatedString::formatted("Url: {}", url());
+        return String::formatted("Url: {}", url());
     case Type::BadUrl:
-        return "BadUrl";
+        return String::from_utf8("BadUrl"sv);
     case Type::Delim:
-        return DeprecatedString::formatted("Delim: {}", m_value);
+        return String::formatted("Delim: {}", m_value);
     case Type::Number:
-        return DeprecatedString::formatted("Number: {}{} (number_type: {})", m_number_value.value() > 0 && m_number_value.is_integer_with_explicit_sign() ? "+" : "", m_number_value.value(), m_number_value.is_integer() ? "Integer" : "Number");
+        return String::formatted("Number: {}{} (number_type: {})", m_number_value.value() > 0 && m_number_value.is_integer_with_explicit_sign() ? "+" : "", m_number_value.value(), m_number_value.is_integer() ? "Integer" : "Number");
     case Type::Percentage:
-        return DeprecatedString::formatted("Percentage: {}% (number_type: {})", percentage(), m_number_value.is_integer() ? "Integer" : "Number");
+        return String::formatted("Percentage: {}% (number_type: {})", percentage(), m_number_value.is_integer() ? "Integer" : "Number");
     case Type::Dimension:
-        return DeprecatedString::formatted("Dimension: {}{} (number_type: {})", dimension_value(), dimension_unit(), m_number_value.is_integer() ? "Integer" : "Number");
+        return String::formatted("Dimension: {}{} (number_type: {})", dimension_value(), dimension_unit(), m_number_value.is_integer() ? "Integer" : "Number");
     case Type::Whitespace:
-        return "Whitespace";
+        return String::from_utf8("Whitespace"sv);
     case Type::CDO:
-        return "CDO";
+        return String::from_utf8("CDO"sv);
     case Type::CDC:
-        return "CDC";
+        return String::from_utf8("CDC"sv);
     case Type::Colon:
-        return "Colon";
+        return String::from_utf8("Colon"sv);
     case Type::Semicolon:
-        return "Semicolon";
+        return String::from_utf8("Semicolon"sv);
     case Type::Comma:
-        return "Comma";
+        return String::from_utf8("Comma"sv);
     case Type::OpenSquare:
-        return "OpenSquare";
+        return String::from_utf8("OpenSquare"sv);
     case Type::CloseSquare:
-        return "CloseSquare";
+        return String::from_utf8("CloseSquare"sv);
     case Type::OpenParen:
-        return "OpenParen";
+        return String::from_utf8("OpenParen"sv);
     case Type::CloseParen:
-        return "CloseParen";
+        return String::from_utf8("CloseParen"sv);
     case Type::OpenCurly:
-        return "OpenCurly";
+        return String::from_utf8("OpenCurly"sv);
     case Type::CloseCurly:
-        return "CloseCurly";
+        return String::from_utf8("CloseCurly"sv);
     }
     VERIFY_NOT_REACHED();
 }
diff --git a/Userland/Libraries/LibWeb/CSS/Parser/Token.h b/Userland/Libraries/LibWeb/CSS/Parser/Token.h
index ee6b842588..afcd4149b8 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/Token.h
+++ b/Userland/Libraries/LibWeb/CSS/Parser/Token.h
@@ -146,7 +146,7 @@ public:
     StringView bracket_mirror_string() const;
 
     DeprecatedString to_deprecated_string() const;
-    DeprecatedString to_debug_string() const;
+    ErrorOr<String> to_debug_string() const;
 
     Position const& start_position() const { return m_start_position; }
     Position const& end_position() const { return m_end_position; }