diff --git a/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.module b/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.module
index fa6289ea..ac30e6ed 100644
--- a/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.module
+++ b/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.module
@@ -329,6 +329,22 @@ function os2forms_forloeb_mail_alter(&$message) {
  * Implements hook_theme().
  */
 function os2forms_forloeb_theme(array &$variables) {
+  $theme['os2forms_forloeb_notification_preview'] = [
+    'variables' => [
+      'webform' => NULL,
+      'handler' => NULL,
+      'type' => NULL,
+      'submission' => NULL,
+      'return_url' => NULL,
+      'render_url' => NULL,
+      'preview_urls' => [
+        'prev' => NULL,
+        'self' => NULL,
+        'next' => NULL,
+      ],
+    ],
+  ];
+
   $theme['os2forms_forloeb_notification_message_email_html'] = [
     'variables' => [
       'message' => [
diff --git a/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.routing.yml b/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.routing.yml
index 44803e50..7f0c28d8 100644
--- a/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.routing.yml
+++ b/web/sites/default/modules/os2forms_forloeb/os2forms_forloeb.routing.yml
@@ -5,3 +5,37 @@ os2forms_forloeb.settings:
     _title: 'OS2Forms forløb'
   requirements:
     _permission: 'administer site configuration'
+
+os2forms_forloeb.meastro_notification.preview:
+  path: '/admin/structure/webform/manage/{webform}/os2forms_forloeb/{handler}/preview/{content_type}'
+  defaults:
+    _controller: '\Drupal\os2forms_forloeb\Controller\MaestroNotificationController::preview'
+    _title: 'Maestro notification preview'
+  options:
+    parameters:
+      webform:
+        type: 'entity:webform'
+  requirements:
+    _permission: 'view any webform submission'
+
+os2forms_forloeb.meastro_notification.preview_render:
+  path: '/admin/structure/webform/manage/{webform}/os2forms_forloeb/{handler}/preview/{content_type}/render/{submission}'
+  defaults:
+    _controller: '\Drupal\os2forms_forloeb\Controller\MaestroNotificationController::previewRender'
+    _title: 'Maestro notification render preview'
+  options:
+    parameters:
+      webform:
+        type: 'entity:webform'
+      submission:
+        type: 'entity:webform_submission'
+  requirements:
+    _permission: 'view any webform submission'
+
+os2forms_forloeb.meastro_notification.preview_message:
+  path: '/os2forms_forloeb/notification/message'
+  defaults:
+    _controller: '\Drupal\os2forms_forloeb\Controller\MaestroNotificationController::message'
+    _title: 'Maestro notification message'
+  requirements:
+    _permission: 'view any webform submission'
diff --git a/web/sites/default/modules/os2forms_forloeb/src/Controller/MaestroNotificationController.php b/web/sites/default/modules/os2forms_forloeb/src/Controller/MaestroNotificationController.php
new file mode 100644
index 00000000..b7e966d9
--- /dev/null
+++ b/web/sites/default/modules/os2forms_forloeb/src/Controller/MaestroNotificationController.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace Drupal\os2forms_forloeb\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Url;
+use Drupal\os2forms_digital_post\Model\Document;
+use Drupal\os2forms_forloeb\MaestroHelper;
+use Drupal\webform\WebformInterface;
+use Drupal\webform\WebformSubmissionInterface;
+use Drupal\webform\WebformSubmissionStorageInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * Maestro notification controller.
+ */
+class MaestroNotificationController extends ControllerBase {
+
+  /**
+   * Constructor.
+   */
+  public function __construct(
+    readonly private WebformSubmissionStorageInterface $webformSubmissionStorage,
+    readonly private MaestroHelper $maestroHelper
+  ) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('entity_type.manager')->getStorage('webform_submission'),
+      $container->get(MaestroHelper::class)
+    );
+  }
+
+  /**
+   * Preview action.
+   */
+  public function preview(Request $request, WebformInterface $webform, string $handler, string $content_type, RouteMatchInterface $routeMatch) {
+    $submissionIds = array_keys($this->webformSubmissionStorage->getQuery()
+      ->condition('webform_id', $webform->id())
+      ->sort('created', 'DESC')
+      ->execute());
+    $currentSubmission = (int) $request->query->get('submission');
+    $index = array_search($currentSubmission, $submissionIds);
+    if (FALSE === $index) {
+      $currentSubmission = reset($submissionIds) ?: NULL;
+      $index = array_search($currentSubmission, $submissionIds);
+    }
+
+    $previewUrls = array_map(
+      static fn ($submission) => Url::fromRoute('os2forms_forloeb.meastro_notification.preview', [
+        'webform' => $webform->id(),
+        'handler' => $handler,
+        'content_type' => $content_type,
+        'submission' => $submission,
+      ]),
+      array_filter([
+        'prev' => $submissionIds[$index + 1] ?? NULL,
+        'self' => $currentSubmission,
+        'next' => $submissionIds[$index - 1] ?? NULL,
+      ])
+    );
+
+    $renderUrl = NULL !== $currentSubmission
+      ? Url::fromRoute('os2forms_forloeb.meastro_notification.preview_render', [
+        'webform' => $webform->id(),
+        'handler' => $handler,
+        'content_type' => $content_type,
+        'submission' => $currentSubmission,
+      ])
+    : NULL;
+
+    return [
+      '#theme' => 'os2forms_forloeb_notification_preview',
+      '#webform' => $webform,
+      '#handler' => $handler,
+      '#type' => $content_type,
+      '#submission' => $currentSubmission,
+      '#return_url' => $webform->toUrl('handlers'),
+      '#render_url' => $renderUrl,
+      '#preview_urls' => $previewUrls,
+    ];
+  }
+
+  /**
+   * Render notification preview.
+   */
+  public function previewRender(Request $request, WebformInterface $webform, string $handler, string $content_type, WebformSubmissionInterface $submission) {
+    $templateTask = [];
+    $maestroQueueID = 0;
+    [$content, $contentType] = $this->maestroHelper->renderNotification($submission, $handler, $templateTask, $maestroQueueID, $content_type);
+
+    $response = new Response($content);
+    if ('pdf' === $contentType) {
+      $response->headers->set('content-type', Document::MIME_TYPE_PDF);
+    }
+
+    return $response;
+  }
+
+  /**
+   * Message action.
+   */
+  public function message(Request $request): Response {
+    $content[] = '<h1>' . $request->get('message') . '</h1>';
+    if ($referer = $request->headers->get('referer')) {
+      $content[] = sprintf('<a href="%s">Go back</a>', $referer);
+    }
+
+    return new Response(implode(PHP_EOL, $content));
+  }
+
+}
diff --git a/web/sites/default/modules/os2forms_forloeb/src/MaestroHelper.php b/web/sites/default/modules/os2forms_forloeb/src/MaestroHelper.php
index a1672d9d..44e2f505 100644
--- a/web/sites/default/modules/os2forms_forloeb/src/MaestroHelper.php
+++ b/web/sites/default/modules/os2forms_forloeb/src/MaestroHelper.php
@@ -18,6 +18,7 @@
 use Drupal\Core\Logger\LoggerChannelInterface;
 use Drupal\Core\Mail\MailManagerInterface;
 use Drupal\Core\Render\Markup;
+use Drupal\Core\Url;
 use Drupal\maestro\Engine\MaestroEngine;
 use Drupal\maestro\Utility\TaskHandler;
 use Drupal\os2forms_digital_post\Helper\DigitalPostHelper;
@@ -205,56 +206,26 @@ private function sendNotification(
     ];
 
     try {
-      $data = $submission->getData();
-      $webform = $submission->getWebform();
-      $handlers = $webform->getHandlers();
+      $handlers = $submission->getWebform()->getHandlers();
       foreach ($handlers as $handler) {
         if (!($handler instanceof MaestroNotificationHandler) || $handler->isDisabled() || $handler->isExcluded()) {
           continue;
         }
-        $settings = $handler->getSettings();
-        $notificationSetting = $settings[MaestroNotificationHandler::NOTIFICATION];
-        $recipientElement = $notificationSetting[MaestroNotificationHandler::RECIPIENT_ELEMENT] ?? NULL;
-        $recipient =
-          // Handle os2forms_person_lookup element.
-          $data[$recipientElement]['cpr_number']
-          // Simple element.
-          ?? $data[$recipientElement]
-          ?? NULL;
-        if (NULL !== $recipient) {
-          // Lifted from MaestroEngine.
-          $maestroTokenData = [
-            'maestro' => [
-              'task' => $templateTask,
-              'queueID' => $maestroQueueID,
-            ],
-          ];
-
-          $subject = $this->tokenManager->replace(
-            $notificationSetting[MaestroNotificationHandler::NOTIFICATION_SUBJECT],
-            $submission,
-            $maestroTokenData
-          );
-
-          $content = $notificationSetting[MaestroNotificationHandler::NOTIFICATION_CONTENT];
-          if (isset($content['value'])) {
-            // Process tokens in content.
-            $content['value'] = $this->tokenManager->replace(
-              $content['value'],
-              $submission,
-              $maestroTokenData
-            );
-          }
-
-          $taskUrl = TaskHandler::getHandlerURL($maestroQueueID);
-          $actionLabel = $notificationSetting[MaestroNotificationHandler::NOTIFICATION_ACTION_LABEL];
 
-          if (filter_var($recipient, FILTER_VALIDATE_EMAIL)) {
-            $this->sendNotificationEmail($recipient, $subject, $content, $taskUrl, $actionLabel, $submission);
-          }
-          else {
-            $this->sendNotificationDigitalPost($recipient, $subject, $content, $taskUrl, $actionLabel, $submission);
-          }
+        [
+          $content,
+          $contentType,
+          $recipient,
+          $subject,
+          $taskUrl,
+          $actionLabel,
+        ] = $this->renderNotification($submission, $handler->getHandlerId(), $templateTask, $maestroQueueID);
+
+        if ('email' === $contentType) {
+          $this->sendNotificationEmail($recipient, $subject, $content, $submission);
+        }
+        else {
+          $this->sendNotificationDigitalPost($recipient, $subject, $content, $taskUrl, $actionLabel, $submission);
         }
       }
     }
@@ -297,13 +268,9 @@ private function loadQueue(): QueueInterface {
   private function sendNotificationEmail(
     string $recipient,
     string $subject,
-    array $content,
-    string $taskUrl,
-    string $actionLabel,
+    string $body,
     WebformSubmissionInterface $submission
   ): void {
-    $body = $this->buildHtml('os2forms_forloeb_notification_message_email_html', $subject, $content, $taskUrl, $actionLabel, $submission);
-
     $message = [
       'subject' => $subject,
       'body' => $body,
@@ -338,26 +305,18 @@ private function sendNotificationEmail(
   private function sendNotificationDigitalPost(
     string $recipient,
     string $subject,
-    array $content,
+    string $content,
     string $taskUrl,
     string $actionLabel,
     WebformSubmissionInterface $submission
-  ): void
-  {
+  ): void {
     if (!$this->moduleHandler->moduleExists('os2forms_digital_post')) {
       throw new RuntimeException('Cannot send digital post. Module os2forms_digital_post not installed.');
     }
 
     try {
-      $pdfBody = $this->buildHtml('os2forms_forloeb_notification_message_pdf_html', $subject, $content, $taskUrl,
-        $actionLabel, $submission);
-      $dompdf = new Dompdf();
-      $dompdf->loadHtml($pdfBody);
-      $dompdf->render();
-      $pdfContent = $dompdf->output();
-
       $document = new Document(
-        $pdfContent,
+        $content,
         Document::MIME_TYPE_PDF,
         $subject . '.pdf'
       );
@@ -371,8 +330,8 @@ private function sendNotificationDigitalPost(
           ->setActionCode(SF1601::ACTION_SELVBETJENING)
           ->setEntryPoint((new EntryPoint())
             ->setUrl($taskUrl)
-          )
-          ->setLabel($actionLabel)
+        )
+          ->setLabel($actionLabel),
       ];
 
       $message = $this->digitalPostHelper->getMeMoHelper()->buildMessage($recipientLookupResult, $senderLabel,
@@ -391,7 +350,8 @@ private function sendNotificationDigitalPost(
         'handler_id' => 'os2forms_forloeb',
         'operation' => 'notification sent',
       ]);
-    } catch (\Exception $exception) {
+    }
+    catch (\Exception $exception) {
       $this->error('Error sending digital post: @message', [
         '@message' => $exception->getMessage(),
         'webform_submission' => $submission,
@@ -401,11 +361,128 @@ private function sendNotificationDigitalPost(
     }
   }
 
+  /**
+   * Render notification.
+   *
+   * @param \Drupal\webform\WebformSubmissionInterface $submission
+   *   The submission.
+   * @param string $handlerId
+   *   The handler ID.
+   * @param array $templateTask
+   *   The Maestro template task.
+   * @param int $maestroQueueID
+   *   The Maestro queue ID.
+   * @param string|null $contentType
+   *   Optional content type. If not set the content type will be compoted based
+   *   on the recipient.
+   *
+   * @return array
+   *   The rendered notification as a list
+   *   - Content
+   *   - Content type
+   *   - Recipient
+   *   - Subject
+   *   - Task URL (for digital post)
+   *   - Action label (for digital post)
+   */
+  public function renderNotification(WebformSubmissionInterface $submission, string $handlerId, array $templateTask, int $maestroQueueID, string $contentType = NULL): array {
+    $handler = $submission->getWebform()->getHandler($handlerId);
+    $settings = $handler->getSettings();
+    $notificationSetting = $settings[MaestroNotificationHandler::NOTIFICATION];
+
+    $data = $submission->getData();
+    $recipientElement = $notificationSetting[MaestroNotificationHandler::RECIPIENT_ELEMENT] ?? NULL;
+    // Handle os2forms_person_lookup element.
+    $recipient = $data[$recipientElement]['cpr_number']
+      // Simple element.
+      ?? $data[$recipientElement]
+      ?? NULL;
+
+    if (NULL !== $recipient) {
+      // Lifted from MaestroEngine.
+      $maestroTokenData = [
+        'maestro' => [
+          'task' => $templateTask,
+          'queueID' => $maestroQueueID,
+        ],
+      ];
+
+      $processValue = static fn (string $value) => $value;
+
+      // Handle a preview, i.e. not a real Maestro context.
+      if (empty($templateTask) || 0 === $maestroQueueID) {
+        $taskUrl = Url::fromRoute('os2forms_forloeb.meastro_notification.preview_message', ['message' => 'This is just a preview'])->toString(TRUE)->getGeneratedUrl();
+
+        $processValue = static function (string $value) use ($taskUrl) {
+          // Replace href="[maestro:task-url]" with href="«$taskUrl»".
+          $value = preg_replace('/href\s*=\s*["\']\[maestro:task-url\]["\']/', sprintf('href="%s"', htmlspecialchars($taskUrl)), $value);
+          $value = preg_replace('/\[(maestro:[^]]+)\]/', '&#91;\1&#93;', $value);
+
+          return $value;
+        };
+      }
+      else {
+        $taskUrl = TaskHandler::getHandlerURL($maestroQueueID);
+      }
+
+      $subject = $this->tokenManager->replace(
+        $processValue($notificationSetting[MaestroNotificationHandler::NOTIFICATION_SUBJECT]),
+        $submission,
+        $maestroTokenData
+      );
+
+      $content = $notificationSetting[MaestroNotificationHandler::NOTIFICATION_CONTENT];
+      if (isset($content['value'])) {
+        // Process tokens in content.
+        $content['value'] = $this->tokenManager->replace(
+          $processValue($content['value']),
+          $submission,
+          $maestroTokenData
+        );
+      }
+
+      $actionLabel = $this->tokenManager->replace($notificationSetting[MaestroNotificationHandler::NOTIFICATION_ACTION_LABEL], $submission);
+
+      if (NULL === $contentType) {
+        $contentType = filter_var($recipient, FILTER_VALIDATE_EMAIL) ? 'email' : 'pdf';
+      }
+
+      switch ($contentType) {
+        case 'email':
+          $content = $this->buildHtml($contentType, $subject, $content, $taskUrl, $actionLabel, $submission);
+          break;
+
+        case 'pdf':
+          $pdfContent = $this->buildHtml($contentType, $subject, $content, $taskUrl, $actionLabel, $submission);
+          $dompdf = new Dompdf();
+          $dompdf->loadHtml($pdfContent);
+          $dompdf->render();
+
+          $content = $dompdf->output();
+          break;
+
+        default:
+          throw new RuntimeException(sprintf('Invalid content type: %s', $contentType));
+      }
+
+      return [
+        $content,
+        $contentType,
+        $recipient,
+        $subject,
+        $taskUrl,
+        $actionLabel,
+      ];
+    }
+
+    throw new RuntimeException();
+  }
+
   /**
    * Build HTML.
    */
   private function buildHtml(
-    string $theme,
+    string $type,
     string $subject,
     array $content,
     string $taskUrl,
@@ -413,6 +490,8 @@ private function buildHtml(
     WebformSubmissionInterface $submission
   ): string|MarkupInterface {
     // Render body as HTML.
+    $theme = sprintf('os2forms_forloeb_notification_message_%s_html', $type);
+
     $build = [
       '#theme' => $theme,
       '#message' => [
diff --git a/web/sites/default/modules/os2forms_forloeb/src/Plugin/WebformHandler/MaestroNotificationHandler.php b/web/sites/default/modules/os2forms_forloeb/src/Plugin/WebformHandler/MaestroNotificationHandler.php
index 37dfb8f9..445b164f 100644
--- a/web/sites/default/modules/os2forms_forloeb/src/Plugin/WebformHandler/MaestroNotificationHandler.php
+++ b/web/sites/default/modules/os2forms_forloeb/src/Plugin/WebformHandler/MaestroNotificationHandler.php
@@ -3,6 +3,7 @@
 namespace Drupal\os2forms_forloeb\Plugin\WebformHandler;
 
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Link;
 use Drupal\webform\Plugin\WebformHandlerBase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -63,9 +64,25 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function getSummary() {
     return [
-      '#markup' => $this->t('Sends notification when triggered by Maestro. The notification will be sent to the person identified by the value of the %element element.', [
-        '%element' => $this->configuration[self::NOTIFICATION][self::RECIPIENT_ELEMENT] ?? NULL,
-      ]),
+      'info' => [
+        '#prefix' => '<div>',
+        '#suffix' => '</div>',
+        '#markup' => $this->t('Sends notification when triggered by Maestro. The notification will be sent to the person identified by the value of the %element element.', [
+          '%element' => $this->configuration[self::NOTIFICATION][self::RECIPIENT_ELEMENT] ?? NULL,
+        ]),
+      ],
+      'preview' => [
+        '#prefix' => '<div>',
+        '#suffix' => '</div>',
+      ]
+      + Link::createFromRoute(
+          $this->t('Preview notifications'),
+          'os2forms_forloeb.meastro_notification.preview', [
+            'webform' => $this->getWebform()->id(),
+            'handler' => $this->getHandlerId(),
+            'content_type' => 'email',
+          ]
+      )->toRenderable(),
     ];
   }
 
diff --git a/web/sites/default/modules/os2forms_forloeb/templates/os2forms-forloeb-notification-preview.html.twig b/web/sites/default/modules/os2forms_forloeb/templates/os2forms-forloeb-notification-preview.html.twig
new file mode 100644
index 00000000..7871a016
--- /dev/null
+++ b/web/sites/default/modules/os2forms_forloeb/templates/os2forms-forloeb-notification-preview.html.twig
@@ -0,0 +1,56 @@
+{#
+  /**
+  * @file
+  * Template for Maestro notification preview.
+  *
+  * Available variables:
+  * - preview_urls: The preview URLs
+  *   - prev: Previous submission preview URL (if any)
+  *   - self: The current preview URL (if any)
+  *   - next: Next submission preview URL (if any)
+  * - webform: The webform
+  * - handler: The handler ID
+  * - content_type: The content type (email, pdf)
+  * - submission: The submission ID
+  * - return_url: The return URL (to list of webform handlers)
+  * - render_url: The render URL to render the actual preview
+  */
+  #}
+<div class="os2forms-forloeb-notification-preview">
+  <style>
+    .os2forms-forloeb-notification-preview .navigation {
+      display: flex;
+      justify-content: space-between;
+    }
+
+    .os2forms-forloeb-notification-preview .preview {
+      width: 100%;
+      height: 40em;
+    }
+  </style>
+
+  <div class="navigation">
+    <div class="paging">
+      {% if preview_urls.prev %}
+        <a href="{{ preview_urls.prev }}">{{ 'Previous submission'|t }}</a>
+      {% endif %}
+      {% if preview_urls.next %}
+        <a href="{{ preview_urls.next }}">{{ 'Next submission'|t }}</a>
+      {% endif %}
+    </div>
+
+    <div class="types">
+      {% for content_type in ['email', 'pdf'] %}
+        <a href="{{ url('os2forms_forloeb.meastro_notification.preview', {webform: webform.id, handler: handler, content_type: content_type, submission: submission}) }}">{{ content_type }}</a>
+      {% endfor %}
+    </div>
+
+    <div class="return">
+      <a href="{{ return_url }}">{{ 'Back to webform handlers'|t }}</a>
+    </div>
+  </div>
+
+  {% if render_url %}
+    <iframe class="preview" src="{{ render_url }}"></iframe>
+  {% endif %}
+</div>