diff --git a/Website/__init__.py b/Website/__init__.py
index 190039d..d2ea280 100644
--- a/Website/__init__.py
+++ b/Website/__init__.py
@@ -86,6 +86,7 @@ def create_app(test_config=None):
                     window.location="http://matekasse.server.c3h/list"
                 });
             </script>
+            <title>Strichliste</title>
             <p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p>
             <p>1 Credit =  1,50 Euro</p>
             <form action="/list/user" method="get"> Search for User: <input name="user"><input type="submit"></form>
@@ -114,6 +115,7 @@ def create_app(test_config=None):
                 var socket = io();
             """ + 'socket.on("update", function(){ window.location="http://matekasse.server.c3h/list/user?id=' + id + '"});' + f"""
                 </script>
+                <title>{escape(user[1])}</title>
                 <p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p>
                 <p> {escape(user[1])} : {user[2]} <p>
                 <form action="/addtag" method="get"><input name="id" type="hidden" value="{user[0]}"><button type="submit">Add Tag</button></form>
@@ -128,7 +130,7 @@ def create_app(test_config=None):
             </html>
             """
         else:
-            return "Error: 043"
+            return render_template("error.html", error_code="043")
 
     @app.route("/adduser")
     def new_user():
@@ -149,9 +151,9 @@ def create_app(test_config=None):
             app.logger.info(f"Deleted user ?", [user_id])
             db.commit()
             socketio.emit("update", "update")
-            return f'<p><p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p> <p>Deleted user {escape(user_name)}</p><a href="/list">return to the tags and user list</a></p>'
+            return f'<title>remove user</title><p><p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p> <p>Deleted user {escape(user_name)}</p><a href="/list">return to the tags and user list</a></p>'
         else:
-            return "Error: 043"
+            return render_template("error.html", error_code="043")
 
     @app.route("/adduser/user", methods=['GET'])
     def adduser():
@@ -159,7 +161,7 @@ def create_app(test_config=None):
         c = db.cursor()
         username = request.args.get("username")
         if username == None:
-            return "418"
+            return render_template("error.html", error_code="418")
         c.execute("SELECT * FROM users WHERE username=?", [username]) 
         if c.fetchall() == []:
             c.execute("INSERT or IGNORE INTO users (username, balance) VALUES (?, 0)", [username])
@@ -177,7 +179,7 @@ def create_app(test_config=None):
                 </html>
                 """
         else:
-            return '<p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p><p>Error: 757</p> '
+            return render_template("error.html", error_code="757")
 
 
     @app.route("/change", methods=['GET'])
@@ -188,7 +190,7 @@ def create_app(test_config=None):
             user_id = request.args.get("id")
             change = int(request.args.get("change"))
         except:
-            return '<p>Error: 095</p><a href="/list">tags and user list</a>'
+            return render_template("error.html", error_code="095")
         c.execute(f"SELECT * FROM users WHERE id=?", [user_id])
         users = c.fetchall()
         if users != []:
@@ -207,14 +209,14 @@ def create_app(test_config=None):
                     </html>
                     """
         else:
-            return '<p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p> <p>Error: 043</p>'
+            return render_template("error.html", error_code="043")
 
     @app.route("/addtag", methods=['GET'])
     def get_addtag_request(): 
         try:
             user_id = int(request.args.get("id"))
         except:  #except im Normalen Code!
-            return "Error: 095"
+            return render_template("error.html", error_code="095")
         session_id = uuid.uuid4()
         session[id] = session_id
         user_queue.put([user_id, "add", session_id])
@@ -252,7 +254,7 @@ def create_app(test_config=None):
         try:
             user_id = int(request.args.get("id"))
         except:  #except im Normalen Code!
-            return "Wrong user id!"
+            return render_template("error.html", error_code="043")
         session_id = uuid.uuid4()
         session[id] = session_id
         user_queue.put([user_id, "remove", session_id])
diff --git a/Website/templates/adduser.html b/Website/templates/adduser.html
index e71c038..2782c02 100644
--- a/Website/templates/adduser.html
+++ b/Website/templates/adduser.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <html lang="en">
+   <title>add user</title>
    <p><a href="/list">user and tag list</a> | <a href="/documentation">Documentation</a></p>
    <p>
     Username: