diff --git a/AK/CharacterTypes.h b/AK/CharacterTypes.h
index 60bc83f9b93..76fed399330 100644
--- a/AK/CharacterTypes.h
+++ b/AK/CharacterTypes.h
@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include <AK/Array.h>
 #include <AK/Types.h>
 
 // NOTE: For a quick reference for most of this, see https://www.cplusplus.com/reference/cctype/ and https://infra.spec.whatwg.org/#code-points.
@@ -151,6 +152,13 @@ constexpr u32 parse_ascii_base36_digit(u32 code_point)
     VERIFY_NOT_REACHED();
 }
 
+static constexpr Array<char, 36> base36_map = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
+constexpr u32 to_ascii_base36_digit(u32 digit)
+{
+    VERIFY(digit < 36);
+    return base36_map[digit];
+}
+
 }
 
 using AK::is_ascii;
@@ -175,5 +183,6 @@ using AK::is_unicode_surrogate;
 using AK::parse_ascii_base36_digit;
 using AK::parse_ascii_digit;
 using AK::parse_ascii_hex_digit;
+using AK::to_ascii_base36_digit;
 using AK::to_ascii_lowercase;
 using AK::to_ascii_uppercase;