diff --git a/core/dbengine.php b/core/dbengine.php
index 3feddb02..d2b96be8 100644
--- a/core/dbengine.php
+++ b/core/dbengine.php
@@ -6,7 +6,6 @@ abstract class SCORE
     const BOOL_Y    = "SCORE_BOOL_Y";
     const BOOL_N    = "SCORE_BOOL_N";
     const BOOL      = "SCORE_BOOL";
-    const STRNORM   = "SCORE_STRNORM";
     const ILIKE     = "SCORE_ILIKE";
 }
 
@@ -55,7 +54,6 @@ class MySQL extends DBEngine
         $data = str_replace(SCORE::BOOL_Y, "'$this->BOOL_Y'", $data);
         $data = str_replace(SCORE::BOOL_N, "'$this->BOOL_N'", $data);
         $data = str_replace(SCORE::BOOL, "ENUM('Y', 'N')", $data);
-        $data = str_replace(SCORE::STRNORM, "", $data);
         $data = str_replace(SCORE::ILIKE, "LIKE", $data);
         return $data;
     }
@@ -101,7 +99,6 @@ class PostgreSQL extends DBEngine
         $data = str_replace(SCORE::BOOL_Y, $this->BOOL_Y, $data);
         $data = str_replace(SCORE::BOOL_N, $this->BOOL_N, $data);
         $data = str_replace(SCORE::BOOL, "BOOL", $data);
-        $data = str_replace(SCORE::STRNORM, "lower", $data);
         $data = str_replace(SCORE::ILIKE, "ILIKE", $data);
         return $data;
     }
@@ -196,7 +193,6 @@ class SQLite extends DBEngine
         $data = str_replace(SCORE::BOOL_Y, "'$this->BOOL_Y'", $data);
         $data = str_replace(SCORE::BOOL_N, "'$this->BOOL_N'", $data);
         $data = str_replace(SCORE::BOOL, "CHAR(1)", $data);
-        $data = str_replace(SCORE::STRNORM, "lower", $data);
         $data = str_replace(SCORE::ILIKE, "LIKE", $data);
         return $data;
     }
diff --git a/core/imageboard/image.php b/core/imageboard/image.php
index af5b7c60..f80402ea 100644
--- a/core/imageboard/image.php
+++ b/core/imageboard/image.php
@@ -306,7 +306,7 @@ class Image
             }
         } elseif ($tag_count === 1 && !preg_match("/[:=><\*\?]/", $tags[0])) {
             $total = $database->get_one(
-                $database->scoreql_to_sql("SELECT count FROM tags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"),
+                $database->scoreql_to_sql("SELECT count FROM tags WHERE LOWER(tag) = LOWER(:tag)"),
                 ["tag"=>$tags[0]]
             );
         } else {
@@ -720,7 +720,7 @@ class Image
                     $database->scoreql_to_sql("
 						SELECT id
 						FROM tags
-						WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)
+						WHERE LOWER(tag) = LOWER(:tag)
 					"),
                     ["tag"=>$tag]
                 );
@@ -733,7 +733,7 @@ class Image
                     $database->execute(
                         $database->scoreql_to_sql(
                             "INSERT INTO image_tags(image_id, tag_id)
-							VALUES(:id, (SELECT id FROM tags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)))"
+							VALUES(:id, (SELECT id FROM tags WHERE LOWER(tag) = LOWER(:tag)))"
                         ),
                         ["id"=>$this->id, "tag"=>$tag]
                     );
@@ -754,7 +754,7 @@ class Image
                     $database->scoreql_to_sql("
 						UPDATE tags
 						SET count = count + 1
-						WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)
+						WHERE LOWER(tag) = LOWER(:tag)
 					"),
                     ["tag"=>$tag]
                 );
@@ -957,7 +957,7 @@ class Image
             $sq = "
                 SELECT id
                 FROM tags
-                WHERE SCORE_STRNORM(tag) LIKE SCORE_STRNORM(:tag)
+                WHERE LOWER(tag) LIKE LOWER(:tag)
             ";
             if ($database->get_driver_name() === DatabaseDriver::SQLITE) {
                 $sq .= "ESCAPE '\\'";
diff --git a/core/imageboard/tag.php b/core/imageboard/tag.php
index 0deeeef7..b65b5313 100644
--- a/core/imageboard/tag.php
+++ b/core/imageboard/tag.php
@@ -52,7 +52,7 @@ class Tag
                 $database->scoreql_to_sql("
 					SELECT newtag
 					FROM aliases
-					WHERE SCORE_STRNORM(oldtag)=SCORE_STRNORM(:tag)
+					WHERE LOWER(oldtag)=LOWER(:tag)
 				"),
                 ["tag"=>$tag]
             );
diff --git a/core/user.php b/core/user.php
index e1976cca..e01b64ac 100644
--- a/core/user.php
+++ b/core/user.php
@@ -99,7 +99,7 @@ class User
     public static function by_name(string $name): ?User
     {
         global $database;
-        $row = $database->get_row($database->scoreql_to_sql("SELECT * FROM users WHERE SCORE_STRNORM(name) = SCORE_STRNORM(:name)"), ["name"=>$name]);
+        $row = $database->get_row($database->scoreql_to_sql("SELECT * FROM users WHERE LOWER(name) = LOWER(:name)"), ["name"=>$name]);
         return is_null($row) ? null : new User($row);
     }
 
diff --git a/ext/admin/main.php b/ext/admin/main.php
index e65ed8a2..14cd5019 100644
--- a/ext/admin/main.php
+++ b/ext/admin/main.php
@@ -138,7 +138,7 @@ class AdminPage extends Extension
     {
         global $database;
         $database->execute($database->scoreql_to_sql(
-            "UPDATE tags SET tag=:tag1 WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag2)"
+            "UPDATE tags SET tag=:tag1 WHERE LOWER(tag) = LOWER(:tag2)"
         ), ["tag1" => $_POST['tag'], "tag2" => $_POST['tag']]);
         log_info("admin", "Fixed the case of ".html_escape($_POST['tag']), "Fixed case");
         return true;
diff --git a/ext/autocomplete/main.php b/ext/autocomplete/main.php
index 2c544a34..5011b627 100644
--- a/ext/autocomplete/main.php
+++ b/ext/autocomplete/main.php
@@ -48,8 +48,8 @@ class AutoComplete extends Extension
                     $database->scoreql_to_sql("
 					SELECT tag, count
 					FROM tags
-					WHERE SCORE_STRNORM(tag) LIKE SCORE_STRNORM(:search) 
-					-- OR SCORE_STRNORM(tag) LIKE SCORE_STRNORM(:cat_search)
+					WHERE LOWER(tag) LIKE LOWER(:search) 
+					-- OR LOWER(tag) LIKE LOWER(:cat_search)
 					AND count > 0
 					ORDER BY count DESC
 					$limitSQL"),
diff --git a/ext/danbooru_api/main.php b/ext/danbooru_api/main.php
index b17d39a5..bd627815 100644
--- a/ext/danbooru_api/main.php
+++ b/ext/danbooru_api/main.php
@@ -86,7 +86,7 @@ class DanbooruApi extends Extension
             foreach ($namelist as $name) {
                 $sqlresult = $database->get_all(
                     $database->scoreql_to_sql(
-                        "SELECT id,tag,count FROM tags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"
+                        "SELECT id,tag,count FROM tags WHERE LOWER(tag) = LOWER(:tag)"
                     ),
                     ['tag'=>$name]
                 );
diff --git a/ext/not_a_tag/main.php b/ext/not_a_tag/main.php
index 4274c831..b9c18e93 100644
--- a/ext/not_a_tag/main.php
+++ b/ext/not_a_tag/main.php
@@ -114,7 +114,7 @@ class NotATag extends Extension
                     $input = validate_input(["d_tag"=>"string"]);
                     $database->execute(
                         $database->scoreql_to_sql(
-                        "DELETE FROM untags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"
+                        "DELETE FROM untags WHERE LOWER(tag) = LOWER(:tag)"
                     ),
                         ["tag"=>$input['d_tag']]
                     );
diff --git a/ext/ouroboros_api/main.php b/ext/ouroboros_api/main.php
index 4766950b..b8ecb32e 100644
--- a/ext/ouroboros_api/main.php
+++ b/ext/ouroboros_api/main.php
@@ -579,10 +579,10 @@ class OuroborosAPI extends Extension
                     $database->scoreql_to_sql(
                         "
                                                         SELECT DISTINCT
-                                                            id, SCORE_STRNORM(substr(tag, 1, 1)), count
+                                                            id, LOWER(substr(tag, 1, 1)), count
                                                         FROM tags
                                                         WHERE count >= :tags_min
-                                                        ORDER BY SCORE_STRNORM(substr(tag, 1, 1)) LIMIT :start, :max_items
+                                                        ORDER BY LOWER(substr(tag, 1, 1)) LIMIT :start, :max_items
                                                     "
                     ),
                     ['tags_min' => $config->get_int(TagListConfig::TAGS_MIN), 'start' => $start, 'max_items' => $limit]
diff --git a/ext/tag_categories/main.php b/ext/tag_categories/main.php
index 90d12aa1..55448914 100644
--- a/ext/tag_categories/main.php
+++ b/ext/tag_categories/main.php
@@ -75,7 +75,7 @@ class TagCategories extends Extension
             $count = $matches[3];
 
             $types = $database->get_col(
-                $database->scoreql_to_sql('SELECT SCORE_STRNORM(category) FROM image_tag_categories')
+                $database->scoreql_to_sql('SELECT LOWER(category) FROM image_tag_categories')
             );
             if (in_array($type, $types)) {
                 $event->add_querylet(
@@ -85,7 +85,7 @@ class TagCategories extends Extension
 					    LEFT JOIN tags t ON it.tag_id = t.id
 					    WHERE images.id = it.image_id
 					    GROUP BY image_id
-					    HAVING SUM(CASE WHEN SCORE_STRNORM(t.tag) LIKE SCORE_STRNORM('$type:%') THEN 1 ELSE 0 END) $cmp $count
+					    HAVING SUM(CASE WHEN LOWER(t.tag) LIKE LOWER('$type:%') THEN 1 ELSE 0 END) $cmp $count
 					)"))
                 );
             }
diff --git a/ext/tag_list/main.php b/ext/tag_list/main.php
index 67e91c61..5b93d9b4 100644
--- a/ext/tag_list/main.php
+++ b/ext/tag_list/main.php
@@ -66,7 +66,7 @@ class TagList extends Extension
                 $res = $database->get_col($database->scoreql_to_sql("
 					SELECT tag
 					FROM tags
-					WHERE SCORE_STRNORM(tag) LIKE SCORE_STRNORM(:search)
+					WHERE LOWER(tag) LIKE LOWER(:search)
 						AND count > 0
 					$limitSQL
 				"), $SQLarr);
@@ -238,10 +238,10 @@ class TagList extends Extension
 
         $tag_data = $database->get_col($database->scoreql_to_sql("
 			SELECT DISTINCT
-				SCORE_STRNORM(substr(tag, 1, 1))
+				LOWER(substr(tag, 1, 1))
 			FROM tags
 			WHERE count >= :tags_min
-			ORDER BY SCORE_STRNORM(substr(tag, 1, 1))
+			ORDER BY LOWER(substr(tag, 1, 1))
 		"), ["tags_min"=>$tags_min]);
 
         $html = "<span class='atoz'>";
@@ -284,7 +284,7 @@ class TagList extends Extension
 				FROM tags
 				WHERE count >= :tags_min
 				AND tag SCORE_ILIKE :starts_with
-				ORDER BY SCORE_STRNORM(tag)
+				ORDER BY LOWER(tag)
 			"), ["tags_min"=>$tags_min, "tags_min2"=>$tags_min, "starts_with"=>$starts_with]);
 
         $html = "";
@@ -327,7 +327,7 @@ class TagList extends Extension
 				FROM tags
 				WHERE count >= :tags_min
 				AND tag SCORE_ILIKE :starts_with
-				ORDER BY SCORE_STRNORM(tag)
+				ORDER BY LOWER(tag)
 				"), ["tags_min"=>$tags_min, "starts_with"=>$starts_with]);
 
         $html = "";
diff --git a/ext/wiki/main.php b/ext/wiki/main.php
index 6f9537c3..2aa4df5e 100644
--- a/ext/wiki/main.php
+++ b/ext/wiki/main.php
@@ -231,7 +231,7 @@ class Wiki extends Extension
             $database->scoreql_to_sql("
 				SELECT *
 				FROM wiki_pages
-				WHERE SCORE_STRNORM(title) LIKE SCORE_STRNORM(:title)
+				WHERE LOWER(title) LIKE LOWER(:title)
 				ORDER BY revision DESC"),
             ["title"=>$title]
         );