diff --git a/api/src/app/services/activity.service.ts b/api/src/app/services/activity.service.ts
index e4c546f..a8b0b2f 100644
--- a/api/src/app/services/activity.service.ts
+++ b/api/src/app/services/activity.service.ts
@@ -224,11 +224,12 @@ export class ActivityService {
         entityTitle = comment.manga.title;
       }
 
-      // Get first 100 characters of comment
+      // Strip HTML tags and get first 100 characters of comment
+      const plainText = this.stripHtml(comment.content);
       const commentPreview =
-        comment.content.length > 100
-          ? `${comment.content.slice(0, 100)}...`
-          : comment.content;
+        plainText.length > 100
+          ? `${plainText.slice(0, 100)}...`
+          : plainText;
 
       return {
         id: `comment-${comment.id}`,
@@ -350,4 +351,11 @@ export class ActivityService {
         return "Unknown Item";
     }
   }
+
+  /**
+   * Strip HTML tags from content for plain text preview.
+   */
+  private stripHtml(html: string): string {
+    return html.replace(/<[^>]*>/g, "").trim();
+  }
 }