diff --git a/include/bx/string.h b/include/bx/string.h
index 21ec6ea..ab1b5d8 100644
--- a/include/bx/string.h
+++ b/include/bx/string.h
@@ -110,12 +110,18 @@ namespace bx
 	///
 	char toLower(char _ch);
 
+	///
+	void toLowerUnsafe(char* _inOutStr, size_t _len);
+
 	///
 	void toLower(char* _inOutStr, size_t _max = INT32_MAX);
 
 	///
 	char toUpper(char _ch);
 
+	///
+	void toUpperUnsafe(char* _inOutStr, size_t _len);
+
 	///
 	void toUpper(char* _inOutStr, size_t _max = INT32_MAX);
 
diff --git a/src/crt.cpp b/src/crt.cpp
index 00e9f2f..d363897 100644
--- a/src/crt.cpp
+++ b/src/crt.cpp
@@ -288,7 +288,7 @@ namespace bx
 
 			if (_param.upper)
 			{
-				toUpper(str, len);
+				toUpperUnsafe(str, len);
 			}
 
 			const char* dot = strnchr(str, '.');
diff --git a/src/string.cpp b/src/string.cpp
index 4093e4e..9e81450 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -60,31 +60,39 @@ namespace bx
 		return _ch + (isUpper(_ch) ? 0x20 : 0);
 	}
 
-	void toLower(char* _inOutStr, size_t _max)
+	void toLowerUnsafe(char* _inOutStr, size_t _len)
 	{
-		size_t len = strnlen(_inOutStr, _max);
-
-		for (size_t ii = 0; ii < len; ++ii)
+		for (size_t ii = 0; ii < _len; ++ii)
 		{
 			*_inOutStr = toLower(*_inOutStr);
 		}
 	}
 
+	void toLower(char* _inOutStr, size_t _max)
+	{
+		const size_t len = strnlen(_inOutStr, _max);
+		toLowerUnsafe(_inOutStr, len);
+	}
+
 	char toUpper(char _ch)
 	{
 		return _ch - (isLower(_ch) ? 0x20 : 0);
 	}
 
-	void toUpper(char* _inOutStr, size_t _max)
+	void toUpperUnsafe(char* _inOutStr, size_t _len)
 	{
-		size_t len = strnlen(_inOutStr, _max);
-
-		for (size_t ii = 0; ii < len; ++ii)
+		for (size_t ii = 0; ii < _len; ++ii)
 		{
 			*_inOutStr = toUpper(*_inOutStr);
 		}
 	}
 
+	void toUpper(char* _inOutStr, size_t _max)
+	{
+		const size_t len = strnlen(_inOutStr, _max);
+		toUpperUnsafe(_inOutStr, len);
+	}
+
 	bool toBool(const char* _str)
 	{
 		char ch = toLower(_str[0]);