diff --git a/artifacts/scripting/headers/sfall.h b/artifacts/scripting/headers/sfall.h
index 6d01dfc6..54304251 100644
--- a/artifacts/scripting/headers/sfall.h
+++ b/artifacts/scripting/headers/sfall.h
@@ -281,6 +281,8 @@
 #define string_format(format, a1, a2)                   sfall_func3("string_format", format, a1, a2)
 #define tile_by_position(x, y)                          sfall_func2("tile_by_position", x, y)
 #define tile_refresh_display                            sfall_func0("tile_refresh_display")
+#define tolower(text)                                   sfall_func1("tolower", text)
+#define toupper(text)                                   sfall_func1("toupper", text)
 #define unjam_lock(obj)                                 sfall_func1("unjam_lock", obj)
 #define unset_unique_id(obj)                            sfall_func2("set_unique_id", obj, -1)
 #define unwield_slot(critter, slot)                     sfall_func2("unwield_slot", critter, slot)
diff --git a/artifacts/scripting/sfall function notes.txt b/artifacts/scripting/sfall function notes.txt
index 6b78de8b..4ce1b8ee 100644
--- a/artifacts/scripting/sfall function notes.txt	
+++ b/artifacts/scripting/sfall function notes.txt	
@@ -603,6 +603,14 @@ optional arguments:
 - returns the tile number at the x, y position relative to the top-left corner of the screen
 - if the position is outside of the range of tiles, it will return -1
 
+> string sfall_func1("tolower", string text)
+- converts all uppercase letters in the given string to lowercase
+- returns -1 on argument error
+
+> string sfall_func1("toupper", string text)
+- converts all lowercase letters in the given string to uppercase
+- returns -1 on argument error
+
 ------------------------
 ------ MORE INFO -------
 ------------------------
diff --git a/sfall/ScriptExtender.cpp b/sfall/ScriptExtender.cpp
index 37270c05..941d3802 100644
--- a/sfall/ScriptExtender.cpp
+++ b/sfall/ScriptExtender.cpp
@@ -432,6 +432,8 @@ static const SfallOpcodeMetadata opcodeMetaArray[] = {
 	{sf_set_window_flag,        "set_window_flag",        {DATATYPE_MASK_INT | DATATYPE_MASK_STR, DATATYPE_MASK_INT, DATATYPE_MASK_INT}},
 	{sf_show_window,            "show_window",            {DATATYPE_MASK_STR}},
 	{sf_tile_by_position,       "tile_by_position",       {DATATYPE_MASK_INT, DATATYPE_MASK_INT}},
+	{sf_tolower,                "tolower",                {DATATYPE_MASK_STR}},
+	{sf_toupper,                "toupper",                {DATATYPE_MASK_STR}},
 	{sf_unjam_lock,             "unjam_lock",             {DATATYPE_MASK_VALID_OBJ}},
 	{sf_unwield_slot,           "unwield_slot",           {DATATYPE_MASK_VALID_OBJ, DATATYPE_MASK_INT}},
 	#ifndef NDEBUG
diff --git a/sfall/ScriptOps/MetaruleOp.hpp b/sfall/ScriptOps/MetaruleOp.hpp
index 44e974e3..caf2a786 100644
--- a/sfall/ScriptOps/MetaruleOp.hpp
+++ b/sfall/ScriptOps/MetaruleOp.hpp
@@ -173,6 +173,8 @@ static const SfallMetarule metaruleArray[] = {
 	{"string_format",           sf_string_format,           2, 5},
 	{"tile_by_position",        sf_tile_by_position,        2, 2},
 	{"tile_refresh_display",    sf_tile_refresh_display,    0, 0},
+	{"tolower",                 sf_tolower,                 1, 1},
+	{"toupper",                 sf_toupper,                 1, 1},
 	{"unjam_lock",              sf_unjam_lock,              1, 1},
 	{"unwield_slot",            sf_unwield_slot,            2, 2},
 	#ifndef NDEBUG
diff --git a/sfall/ScriptOps/ScriptUtils.hpp b/sfall/ScriptOps/ScriptUtils.hpp
index c67e8ca8..ff9c6b9f 100644
--- a/sfall/ScriptOps/ScriptUtils.hpp
+++ b/sfall/ScriptOps/ScriptUtils.hpp
@@ -998,3 +998,28 @@ static void sf_get_text_width() {
 		opHandler.setReturn(0);
 	}
 }
+
+static char* _stdcall cstrdup(const char* str) {
+	size_t len = strlen(str);
+	const size_t bufMaxLen = GlblTextBufferSize() - 1;
+	if (len > bufMaxLen) len = bufMaxLen;
+
+	if (len) memcpy(gTextBuffer, str, len);
+	gTextBuffer[len] = '\0';
+
+	return gTextBuffer;
+}
+
+static void sf_tolower() {
+	std::string str = std::string(opHandler.arg(0).strValue());
+	std::transform(str.begin(), str.end(), str.begin(), ::tolower);
+
+	opHandler.setReturn(cstrdup(str.c_str()));
+}
+
+static void sf_toupper() {
+	std::string str = std::string(opHandler.arg(0).strValue());
+	std::transform(str.begin(), str.end(), str.begin(), ::toupper);
+
+	opHandler.setReturn(cstrdup(str.c_str()));
+}