diff --git a/util/string_compare.hh b/util/string_compare.hh
new file mode 100644
index 0000000..91d7393
--- /dev/null
+++ b/util/string_compare.hh
@@ -0,0 +1,10 @@
+#pragma once
+#include <algorithm>
+#include <cctype>
+#include <string_view>
+
+//case insensitive less
+constexpr bool less_ci(std::string_view a, std::string_view b) {
+	return std::ranges::lexicographical_compare(
+		a, b, [](const char char1, const char char2) { return std::tolower(char1) < std::tolower(char2); });
+}