diff --git a/cwText.cpp b/cwText.cpp
index 4ed9a69..f8d0007 100644
--- a/cwText.cpp
+++ b/cwText.cpp
@@ -54,6 +54,21 @@ namespace cw
 unsigned cw::textLength( const char* s )
 { return s == nullptr ? 0 : strlen(s); }
 
+void textToLower( char* s )
+{
+  if( s != nullptr )
+    for(; *s; ++s)
+      *s = std::tolower(*s);
+}
+
+void textToUpper( char* s )
+{
+  if( s != nullptr )
+    for(; *s; ++s)
+      *s = std::toupper(*s);
+}
+
+
 int cw::textCompare( const char* s0, const char* s1 )
 {
   if( s0 == nullptr || s1 == nullptr )
diff --git a/cwText.h b/cwText.h
index 64f579d..aff115f 100644
--- a/cwText.h
+++ b/cwText.h
@@ -6,6 +6,9 @@ namespace cw
 {
   // Return 0 if s is null.
   unsigned textLength( const char* s );
+
+  void textToLower( char* s );
+  void textToUpper( char* s );
   
   // Note: if both s0 and s1 are nullptr then a match is indicated
   int textCompare( const char* s0, const char* s1 );