diff --git a/Single-Header/dn_single_header.cpp b/Single-Header/dn_single_header.cpp
index f482fed..126172c 100644
--- a/Single-Header/dn_single_header.cpp
+++ b/Single-Header/dn_single_header.cpp
@@ -1,4 +1,4 @@
-// Generated by the DN single header generator 2026-07-14 16:32:48
+// Generated by the DN single header generator 2026-07-14 21:55:23
 
 // DN: Single header generator commented out => #if defined(_CLANGD)
 //   #define DN_WITH_TESTS 1
@@ -3264,27 +3264,38 @@ DN_API DN_Str8x32 DN_Str8x32FromU64(DN_U64 val, char separator)
 }
 
 
-DN_API bool DN_Str8IsAll(DN_Str8 string, DN_Str8IsAllType is_all)
+DN_API bool DN_Str8Is(DN_Str8 string, DN_Str8IsFlags flags)
 {
   bool result = string.count;
   if (!result)
     return result;
 
-  switch (is_all) {
-    case DN_Str8IsAllType_Digits: {
-      for (DN_USize index = 0; result && index < string.count; index++)
-        result = string.data[index] >= '0' && string.data[index] <= '9';
-    } break;
-
-    case DN_Str8IsAllType_Hex: {
-      DN_Str8 trimmed = DN_Str8TrimPrefix(string, DN_Str8Lit("0x"), DN_Str8EqCase_Insensitive);
-      for (DN_USize index = 0; result && index < trimmed.count; index++) {
-        char ch = trimmed.data[index];
-        result  = (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
-      }
-    } break;
+  if (result && (flags & DN_Str8IsFlags_Digits)) {
+    for (DN_USize index = 0; result && index < string.count; index++)
+      result = string.data[index] >= '0' && string.data[index] <= '9';
   }
 
+  if (result && (flags & DN_Str8IsFlags_Hex)) {
+    DN_Str8 trimmed = DN_Str8TrimPrefix(string, DN_Str8Lit("0x"), DN_Str8EqCase_Insensitive);
+    for (DN_USize index = 0; result && index < trimmed.count; index++) {
+      char ch = trimmed.data[index];
+      result  = (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
+    }
+  }
+
+  if (result && (flags & DN_Str8IsFlags_Lowercase)) {
+    for (DN_USize index = 0; result && index < string.count; index++) {
+      if (string.data[index] >= 'A' && string.data[index] <= 'Z')
+        result = false;
+    }
+  }
+
+  if (result && (flags & DN_Str8IsFlags_Uppercase)) {
+    for (DN_USize index = 0; result && index < string.count; index++) {
+      if (string.data[index] >= 'a' && string.data[index] <= 'z')
+        result = false;
+    }
+  }
   return result;
 }
 
@@ -10932,28 +10943,28 @@ DN_API DN_TestCore DN_TestSuite(DN_Arena *arena_)
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on non-digit string")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8Lit("@123string"), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8Lit("@123string"), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, str_result == false);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on nullptr")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8FromPtr(nullptr, 0), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8FromPtr(nullptr, 0), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, str_result == false);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on string w/ 0 size")) {
         char const buf[]      = "@123string";
-        DN_B32     str_result = DN_Str8IsAll(DN_Str8FromPtr(buf, 0), DN_Str8IsAllType_Digits);
+        DN_B32     str_result = DN_Str8Is(DN_Str8FromPtr(buf, 0), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, !str_result);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits success")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8Lit("23"), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8Lit("23"), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, DN_Cast(bool) str_result == true);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on whitespace")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8Lit("23 "), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8Lit("23 "), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, DN_Cast(bool) str_result == false);
       }
 
diff --git a/Single-Header/dn_single_header.h b/Single-Header/dn_single_header.h
index c0fe5b2..f24f32a 100644
--- a/Single-Header/dn_single_header.h
+++ b/Single-Header/dn_single_header.h
@@ -1,4 +1,4 @@
-// Generated by the DN single header generator 2026-07-14 16:32:48
+// Generated by the DN single header generator 2026-07-14 21:55:22
 
 #if !defined(DN_H)
 #define DN_H
@@ -1401,10 +1401,13 @@ enum DN_Str8EqCase
   DN_Str8EqCase_Insensitive,
 };
 
-enum DN_Str8IsAllType
+typedef DN_U32 DN_Str8IsFlags;
+enum DN_Str8IsFlags_
 {
-  DN_Str8IsAllType_Digits,
-  DN_Str8IsAllType_Hex,
+  DN_Str8IsFlags_Digits    = 1 << 0,
+  DN_Str8IsFlags_Hex       = 1 << 1, // String consists of [0x|0X] + <[digit|A-F|a-f]...>
+  DN_Str8IsFlags_Lowercase = 1 << 2, // String is all lowercase characters (case-ness is only checked for ASCII, non-ASCII is permitted always)
+  DN_Str8IsFlags_Uppercase = 1 << 3, // String is all uppercase characters (case-ness is only checked for ASCII, non-ASCII is permitted always)
 };
 
 typedef struct DN_Str8BSplitResult DN_Str8BSplitResult;
@@ -5009,7 +5012,7 @@ DN_API void                     DN_Str8x1024AppendFmt
 DN_API void                     DN_Str8x1024AppendFmtV                                 (DN_Str8x1024 *str, DN_FMT_ATTRIB char const *fmt, va_list args);
 
 DN_API DN_Str8x32               DN_Str8x32FromU64                                      (DN_U64 val, char separator);
-DN_API bool                     DN_Str8IsAll                                           (DN_Str8 string, DN_Str8IsAllType is_all);
+DN_API bool                     DN_Str8Is                                              (DN_Str8 string, DN_Str8IsFlags flags);
 DN_API char *                   DN_Str8End                                             (DN_Str8 string);
 DN_API DN_Str8                  DN_Str8Subset                                          (DN_Str8 string, DN_USize offset, DN_USize count);
 DN_API DN_Str8                  DN_Str8Advance                                         (DN_Str8 string, DN_USize amount);
diff --git a/Source/dn.cpp b/Source/dn.cpp
index 1983ae8..2604a3e 100644
--- a/Source/dn.cpp
+++ b/Source/dn.cpp
@@ -3262,27 +3262,38 @@ DN_API DN_Str8x32 DN_Str8x32FromU64(DN_U64 val, char separator)
 }
 
 
-DN_API bool DN_Str8IsAll(DN_Str8 string, DN_Str8IsAllType is_all)
+DN_API bool DN_Str8Is(DN_Str8 string, DN_Str8IsFlags flags)
 {
   bool result = string.count;
   if (!result)
     return result;
 
-  switch (is_all) {
-    case DN_Str8IsAllType_Digits: {
-      for (DN_USize index = 0; result && index < string.count; index++)
-        result = string.data[index] >= '0' && string.data[index] <= '9';
-    } break;
-
-    case DN_Str8IsAllType_Hex: {
-      DN_Str8 trimmed = DN_Str8TrimPrefix(string, DN_Str8Lit("0x"), DN_Str8EqCase_Insensitive);
-      for (DN_USize index = 0; result && index < trimmed.count; index++) {
-        char ch = trimmed.data[index];
-        result  = (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
-      }
-    } break;
+  if (result && (flags & DN_Str8IsFlags_Digits)) {
+    for (DN_USize index = 0; result && index < string.count; index++)
+      result = string.data[index] >= '0' && string.data[index] <= '9';
   }
 
+  if (result && (flags & DN_Str8IsFlags_Hex)) {
+    DN_Str8 trimmed = DN_Str8TrimPrefix(string, DN_Str8Lit("0x"), DN_Str8EqCase_Insensitive);
+    for (DN_USize index = 0; result && index < trimmed.count; index++) {
+      char ch = trimmed.data[index];
+      result  = (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
+    }
+  }
+
+  if (result && (flags & DN_Str8IsFlags_Lowercase)) {
+    for (DN_USize index = 0; result && index < string.count; index++) {
+      if (string.data[index] >= 'A' && string.data[index] <= 'Z')
+        result = false;
+    }
+  }
+
+  if (result && (flags & DN_Str8IsFlags_Uppercase)) {
+    for (DN_USize index = 0; result && index < string.count; index++) {
+      if (string.data[index] >= 'a' && string.data[index] <= 'z')
+        result = false;
+    }
+  }
   return result;
 }
 
@@ -10930,28 +10941,28 @@ DN_API DN_TestCore DN_TestSuite(DN_Arena *arena_)
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on non-digit string")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8Lit("@123string"), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8Lit("@123string"), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, str_result == false);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on nullptr")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8FromPtr(nullptr, 0), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8FromPtr(nullptr, 0), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, str_result == false);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on string w/ 0 size")) {
         char const buf[]      = "@123string";
-        DN_B32     str_result = DN_Str8IsAll(DN_Str8FromPtr(buf, 0), DN_Str8IsAllType_Digits);
+        DN_B32     str_result = DN_Str8Is(DN_Str8FromPtr(buf, 0), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, !str_result);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits success")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8Lit("23"), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8Lit("23"), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, DN_Cast(bool) str_result == true);
       }
 
       for (DN_TestScopeF(&result, "[Strings] Is all digits fails on whitespace")) {
-        DN_B32 str_result = DN_Str8IsAll(DN_Str8Lit("23 "), DN_Str8IsAllType_Digits);
+        DN_B32 str_result = DN_Str8Is(DN_Str8Lit("23 "), DN_Str8IsFlags_Digits);
         DN_TestVerifyExpr(&result, DN_Cast(bool) str_result == false);
       }
 
diff --git a/Source/dn.h b/Source/dn.h
index 3ec0be6..7bdf9f2 100644
--- a/Source/dn.h
+++ b/Source/dn.h
@@ -1399,10 +1399,13 @@ enum DN_Str8EqCase
   DN_Str8EqCase_Insensitive,
 };
 
-enum DN_Str8IsAllType
+typedef DN_U32 DN_Str8IsFlags;
+enum DN_Str8IsFlags_
 {
-  DN_Str8IsAllType_Digits,
-  DN_Str8IsAllType_Hex,
+  DN_Str8IsFlags_Digits    = 1 << 0,
+  DN_Str8IsFlags_Hex       = 1 << 1, // String consists of [0x|0X] + <[digit|A-F|a-f]...>
+  DN_Str8IsFlags_Lowercase = 1 << 2, // String is all lowercase characters (case-ness is only checked for ASCII, non-ASCII is permitted always)
+  DN_Str8IsFlags_Uppercase = 1 << 3, // String is all uppercase characters (case-ness is only checked for ASCII, non-ASCII is permitted always)
 };
 
 typedef struct DN_Str8BSplitResult DN_Str8BSplitResult;
@@ -3079,7 +3082,7 @@ DN_API void                     DN_Str8x1024AppendFmt
 DN_API void                     DN_Str8x1024AppendFmtV                                 (DN_Str8x1024 *str, DN_FMT_ATTRIB char const *fmt, va_list args);
 
 DN_API DN_Str8x32               DN_Str8x32FromU64                                      (DN_U64 val, char separator);
-DN_API bool                     DN_Str8IsAll                                           (DN_Str8 string, DN_Str8IsAllType is_all);
+DN_API bool                     DN_Str8Is                                              (DN_Str8 string, DN_Str8IsFlags flags);
 DN_API char *                   DN_Str8End                                             (DN_Str8 string);
 DN_API DN_Str8                  DN_Str8Subset                                          (DN_Str8 string, DN_USize offset, DN_USize count);
 DN_API DN_Str8                  DN_Str8Advance                                         (DN_Str8 string, DN_USize amount);