diff --git a/string_utils.py b/string_utils.py
new file mode 100644
index 0000000..9e57fde
--- /dev/null
+++ b/string_utils.py
@@ -0,0 +1,29 @@
+"""String utility functions."""
+
+
+def reverse_words(sentence: str) -> str:
+    return " ".join(sentence.split()[::-1])
+
+
+def count_vowels(text: str) -> int:
+    return sum(1 for c in text.lower() if c in "aeiou")
+
+
+def truncate(text: str, max_length: int, suffix: str = "...") -> str:
+    if len(text) <= max_length:
+        return text
+    return text[: max_length - len(suffix)] + suffix
+
+
+def to_snake_case(text: str) -> str:
+    result = []
+    for i, char in enumerate(text):
+        if char.isupper() and i > 0:
+            result.append("_")
+        result.append(char.lower())
+    return "".join(result)
+
+
+def is_palindrome(text: str) -> bool:
+    cleaned = "".join(c.lower() for c in text if c.isalnum())
+    return cleaned == cleaned[::-1]