diff --git a/google_vision.module b/google_vision.module
index 51c50c5..26c0078 100755
--- a/google_vision.module
+++ b/google_vision.module
@@ -7,6 +7,9 @@
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\field\FieldConfigInterface;
 use Drupal\google_vision\GoogleVisionAPI;
+use Drupal\field\FieldStorageConfigInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
 
 /**
  * Implements hook_entity_presave().
@@ -49,18 +52,45 @@ function google_vision_form_field_config_edit_form_alter(&$form, \Drupal\Core\Fo
       '#default_value' => !empty($settings['google_vision']) ? $settings['google_vision'] : FALSE,
     ];
 
-    $form['#entity_builders'][] = 'google_vision_form_field_config_form_builder';
+    $form['#entity_builders'][] = 'google_vision_form_field_config_form_taxonomy_builder';
+  }
+
+  if($field_entity->getType() == 'image') {
+    $settings = $form_state->getFormObject()->getEntity()->getThirdPartySettings('google_vision');
+    $form['safe_search'] = [
+      '#type' => 'checkbox',
+      '#title' => t('Enable Safe Search'),
+      '#description' => t('Detects and avoids explicit contents.'),
+      '#default_value' => !empty($settings['google_vision']) ? $settings['google_vision'] : FALSE,
+    ];
+
+    $form['#entity_builders'][] = 'google_vision_form_field_config_form_image_builder';
   }
 }
 
 /**
- * Form builder to save the settings.
+ * Form builder to save the settings for entity reference.
  */
-function google_vision_form_field_config_form_builder($entity_type, FieldConfigInterface $type, &$form, FormStateInterface $form_state) {
+function google_vision_form_field_config_form_taxonomy_builder($entity_type, FieldConfigInterface $type, &$form, FormStateInterface $form_state) {
   $type->setThirdPartySetting('google_vision', 'google_vision', $form_state->getValue('google_vision'));
 }
 
 /**
+ * Implements hook_entity_type_alter().
+ */
+function google_vision_entity_type_alter(array &$entity_types) {
+  $node = $entity_types['node'];
+  $node->addConstraint('SafeSearch');
+}
+
+/**
+ * Form builder to save the settings for images.
+ */
+function google_vision_form_field_config_form_image_builder($entity_type, FieldConfigInterface $type, &$form, FormStateInterface $form_state) {
+  $type->setThirdPartySetting('google_vision', 'google_vision', $form_state->getValue('safe_search'));
+}
+
+/**
  * Try to get and add labels for the file entity.
  */
 function google_vision_file_entity_add_labels($file, $field, $vid) {
diff --git a/src/Plugin/Validation/Constraint/SafeSearchConstraint.php b/src/Plugin/Validation/Constraint/SafeSearchConstraint.php
new file mode 100755
index 0000000..aa40208
--- /dev/null
+++ b/src/Plugin/Validation/Constraint/SafeSearchConstraint.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\google_vision\Plugin\Validation\Constraint;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * Checks that the node is assigned only a "leaf" term in the forum taxonomy.
+ *
+ * @Constraint(
+ *   id = "SafeSearch",
+ *   label = @Translation("Safe Search", context = "Validation"),
+ * )
+ */
+class SafeSearchConstraint extends Constraint {
+
+  public $message = 'The file %title contains explicit content and will not be saved.';
+}
diff --git a/src/Plugin/Validation/Constraint/SafeSearchConstraintValidator.php b/src/Plugin/Validation/Constraint/SafeSearchConstraintValidator.php
new file mode 100755
index 0000000..6703ab3
--- /dev/null
+++ b/src/Plugin/Validation/Constraint/SafeSearchConstraintValidator.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace Drupal\google_vision\Plugin\Validation\Constraint;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Drupal\google_vision\GoogleVisionAPI;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\file\FileInterface;
+use Drupal\node\NodeInterface;
+use Drupal\field\FieldConfigInterface;
+use Drupal\field\FieldStorageConfigInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+
+/**
+ * Validates the SafeSearch constraint.
+ */
+class SafeSearchConstraintValidator extends ConstraintValidator {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validate($data, Constraint $constraint) {
+    foreach(\Drupal::service('entity_field.manager')->getFieldDefinitions('node', $data->getType()) as $field_name => $field_def) {
+      // if field is image field.
+      if($field_def->getType() == 'image') {
+        $settings = $field_def->getThirdPartySettings('google_vision');
+        // if the Safe Search detection is on.
+        if(!empty($settings['google_vision'])) {
+          // if the image is uploaded.
+          if(!empty($data->get($field_name)->target_id)) {
+            // Retrieve the file uri.
+            $file_uri = $data->get($field_name)->entity->getFileUri();
+            if($filepath = \Drupal::service('file_system')->realpath($file_uri)) {
+              $result = \Drupal::service('google_vision.api')->safeSearchDetection($filepath);
+              if(!empty($result['responses'][0]['safeSearchAnnotation'])) {
+                $adult = $result['responses'][0]['safeSearchAnnotation']['adult'];
+                $likelihood = array('LIKELY', 'VERY_LIKELY');
+                // if the image has explicit content.
+                if(in_array($adult, $likelihood)) {
+                  $this->context->addViolation($constraint->message, array('%title' => $data->get($field_name)->entity->getFilename()));
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}