diff --git a/html2md.py b/html2md.py
index 86c9120..1e159bc 100644
--- a/html2md.py
+++ b/html2md.py
@@ -82,7 +82,7 @@ class SmartMarkdownConverter:
     def _detect_and_extract(self, soup: BeautifulSoup) -> Tuple[str, any]:
         """Detect content type and extract structured content."""
 
-        # Forum detection (Discourse, phpBB, vBulletin, etc.)
+        # Forum detection (Discourse, phpBB, vBulletin, Reddit, etc.)
         forum_indicators = [
             '.post_container',  # Discourse archived (has avatar_container + post)
             '.topic-post',  # Discourse live
@@ -90,6 +90,11 @@ class SmartMarkdownConverter:
             '.message',  # XenForo
             '.postcontainer',  # vBulletin
             'article.boxed',  # Generic
+            '.thing.comment',  # Reddit old
+            'shreddit-comment',  # Reddit new
+            '.Comment',  # Reddit redesign
+            '.remarkbox-comment',  # Remarkbox
+            '.comment',  # Generic comments
         ]
         for post_sel in forum_indicators:
             posts = soup.select(post_sel)
@@ -153,7 +158,10 @@ class SmartMarkdownConverter:
                 post.select_one('.avatar-flair img') or
                 post.select_one('.user-avatar img') or
                 post.select_one('.postprofile img') or
-                post.select_one('.author img')
+                post.select_one('.author img') or
+                post.select_one('img[alt*="avatar"]') or  # Reddit
+                post.select_one('.flair img') or  # Reddit flair
+                post.select_one('.remarkbox-avatar img')  # Remarkbox
             )
             if avatar:
                 src = avatar.get('src', '')
@@ -171,7 +179,10 @@ class SmartMarkdownConverter:
                 post.select_one('a[data-user-card]') or
                 post.select_one('.names .name') or
                 post.select_one('.postprofile dt') or
-                post.select_one('strong.username')
+                post.select_one('strong.username') or
+                post.select_one('a[href*="/user/"]') or  # Reddit
+                post.select_one('a[href*="/u/"]') or  # Reddit shorthand
+                post.select_one('.remarkbox-author')  # Remarkbox
             )
             if username_el:
                 post_data['username'] = username_el.get_text(strip=True)
@@ -197,7 +208,10 @@ class SmartMarkdownConverter:
                 post.select_one('.post_body') or
                 post.select_one('.entry-content') or
                 post.select_one('.content') or
-                post.select_one('.post')  # Fallback to inner .post div
+                post.select_one('.post') or  # Fallback to inner .post div
+                post.select_one('.md') or  # Reddit markdown content
+                post.select_one('.usertext-body') or  # Reddit old
+                post.select_one('.remarkbox-content')  # Remarkbox
             )
             if content_el:
                 post_data['content'] = self._element_to_markdown(content_el)