diff --git a/custom/modules/emmr_util/transupdate.php b/custom/modules/emmr_util/transupdate.php
new file mode 100644
index 0000000..0dab0d3
--- /dev/null
+++ b/custom/modules/emmr_util/transupdate.php
@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * @file
+ * Contains transupdate.php.
+ * This script updates all legacy recipes to the new CKEditor 5 transcription format.
+ */
+
+use Drupal\node\Entity\Node;
+
+echo "\n";
+// Get an array of all 'recipe' node ids.
+$recipe_nids = \Drupal::entityQuery('node')
+  ->condition('type', 'emmr_recipe')
+  ->accessCheck(FALSE)->execute();
+
+// Load all the recipes.
+$recipes = Node::loadMultiple($recipe_nids);
+// Iterate.
+foreach ($recipes as $recipe) {
+  // Get transcription value.
+  $trans = $recipe->field_recipe_transcription->getValue()[0]['value'];
+  // Find transcription item matches.
+  preg_match_all('/<trxn>(.*?)<\/trxn>/', $trans, $matches);
+  // Iterate.
+  foreach ($matches[1] as $match) {
+    // If transcription insert...
+    if (str_contains($match, 'trxn-caret')) {
+      // Get text.
+      preg_match('/<span class="trxn-text">(.*?)<\/span>/', $match, $text);
+      $text = $text[1];
+      // Build new transcription item.
+      $new = 
+        "<trxnin><span class='trxn-caret'>^</span><span class='trxn-text'>$text</span></trxnin>";
+      // Replace old item with new in transcription.
+      $trans = str_replace("<trxn>$match</trxn>", $new, $trans, $count);
+    }
+    // If transcription replace...
+    if (str_contains($match, 'trxn-retext')) {
+      // Get text.
+      preg_match('/<s>(.*?)<\/s>/', $match, $text);
+      $text = $text[1];
+      // Get replacement text.
+      preg_match('/<span class="trxn-retext">(.*?)<\/span>/', $match, $retext);
+      $retext = $retext[1];
+      // Build new transcription item.
+      $new = 
+        "<trxnrep><span class='trxn-retext'>$retext</span><s class='trxn-replaced'>$text</s></trxnrep>";
+      // Replace old item with new in transcription.
+      $trans = str_replace("<trxn>$match</trxn>", $new, $trans, $count);
+    }
+    // If transcription marginalia...
+    if (str_contains($match, 'trxn-number')) {
+      // Get number.
+      preg_match('/<span class="trxn-number">(.*?)<\/span>/', $match, $num);
+      $num = $num[1];
+      // Get text.
+      preg_match('/<span class="trxn-text">(.*?)<\/span>/', $match, $text);
+      $text = $text[1];
+      // Build new transcription item.
+      $new = 
+        "<trxnmar><span class='trxn-number'>$num</span><span class='trxn-text'>$text</span></trxnmar>";
+      // Replace old item with new in transcription.
+      $trans = str_replace("<trxn>$match</trxn>", $new, $trans, $count);
+    }
+  }
+  if ($trans != $recipe->field_recipe_transcription->getValue()[0]['value']) {
+    $recipe->set('field_recipe_transcription', $trans);
+    $recipe->save();
+    $title = $recipe->title->getValue()[0]['value'];
+    echo "\nUpdated emmr_recipe [$title]";
+  }
+}
+echo "\n";