diff --git a/src/Plugin/Field/FieldFormatter/SmartTrimFormatter.php b/src/Plugin/Field/FieldFormatter/SmartTrimFormatter.php
index 616a5e6..969aa41 100644
--- a/src/Plugin/Field/FieldFormatter/SmartTrimFormatter.php
+++ b/src/Plugin/Field/FieldFormatter/SmartTrimFormatter.php
@@ -49,6 +49,7 @@ class SmartTrimFormatter extends FormatterBase {
       'more_aria_label' => 'Read more about [node:title]',
       'summary_handler' => 'full',
       'trim_options' => [],
+      'trim_preserve_tags' => '',
     ] + parent::defaultSettings();
   }
 
@@ -185,6 +186,18 @@ class SmartTrimFormatter extends FormatterBase {
       '#default_value' => empty($trim_options_value) ? [] : array_keys(array_filter($trim_options_value)),
     ];
 
+    $element['trim_preserve_tags'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Tags to preserve'),
+      '#description' => $this->t('Which tags to preserve if "Strip HTML" is chosen above. Format as "<p><a>" to preserve p and a tags.'),
+      '#default_value' => $this->getSetting('trim_preserve_tags'),
+      '#states' => [
+        'visible' => [
+          ':input[name="fields[body][settings_edit_form][settings][trim_options][text]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+
     return $element;
   }
 
@@ -218,6 +231,7 @@ class SmartTrimFormatter extends FormatterBase {
     $element = [];
     $setting_trim_options = $this->getSetting('trim_options');
     $settings_summary_handler = $this->getSetting('summary_handler');
+    $setting_trim_preserve_tags = $this->getSetting('trim_preserve_tags');
     $entity = $items->getEntity();
 
     foreach ($items as $delta => $item) {
@@ -252,7 +266,7 @@ class SmartTrimFormatter extends FormatterBase {
           $output = preg_replace('/<style[^>]*>.*?<\/style>/is', ' ', $output);
 
           // Strip tags.
-          $output = strip_tags($output);
+          $output = strip_tags($output, $setting_trim_preserve_tags);
 
           // Strip out line breaks.
           $output = preg_replace('/\n|\r|\t/m', ' ', $output);