Mustapha Ben Ellafi
--- a/src/HtmlParser.php 0 → 100644
+++ b/src/HtmlParser.php 0 → 100644
+   */
+  public function __construct() {
+    $this->html5Parser = new HTML5();
+  }
+
+  /**
+   * Converts HTML content to a CustomElement tree structure.
+   *
+   * @param string $htmlContent
+   *   The HTML content to convert.
+   *
+   * @return \Drupal\custom_elements\CustomElement|null
+   *   Returns the root CustomElement or NULL if conversion fails.
+   */
+  public function convertHtmlToCustomElement(string $htmlContent): ?CustomElement {
+    $dom = $this->html5Parser->loadHTML($htmlContent);
--- a/src/CustomElementNormalizer.php
+++ b/src/CustomElementNormalizer.php
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;

 /**
- * Formats a custom element structure into an array.
+ * Formats a custom element structure into an array or HTML string.
--- a/tests/src/Kernel/HtmlParserTest.php 0 → 100644
+++ b/tests/src/Kernel/HtmlParserTest.php 0 → 100644
+   */
+  protected static $modules = ['custom_elements'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+    $this->htmlParser = $this->container->get('custom_elements.html_parser');
+    $this->normalizer = $this->container->get('custom_elements.normalizer');
+  }
+
+  /**
+   * Tests converting HTML content to custom elements and back.
+   */
+  public function testHtmlToCustomElementAndBack() {