diff --git a/AK/DeprecatedString.cpp b/AK/DeprecatedString.cpp
index 0b1064f9900..9c45cced074 100644
--- a/AK/DeprecatedString.cpp
+++ b/AK/DeprecatedString.cpp
@@ -455,4 +455,11 @@ DeprecatedStringCodePointIterator DeprecatedString::code_points() const
     return DeprecatedStringCodePointIterator(*this);
 }
 
+ErrorOr<DeprecatedString> DeprecatedString::from_utf8(ReadonlyBytes bytes)
+{
+    if (!Utf8View(bytes).validate())
+        return Error::from_string_literal("DeprecatedString::from_utf8: Input was not valid UTF-8");
+    return DeprecatedString { StringImpl::create(bytes) };
+}
+
 }
diff --git a/AK/DeprecatedString.h b/AK/DeprecatedString.h
index 0155fcdf19a..35474f9bffc 100644
--- a/AK/DeprecatedString.h
+++ b/AK/DeprecatedString.h
@@ -95,6 +95,8 @@ public:
 
     DeprecatedString(DeprecatedFlyString const&);
 
+    static ErrorOr<DeprecatedString> from_utf8(ReadonlyBytes);
+
     [[nodiscard]] static DeprecatedString repeated(char, size_t count);
     [[nodiscard]] static DeprecatedString repeated(StringView, size_t count);