diff --git a/boards/templates/boards/base.html b/boards/templates/boards/base.html
--- a/boards/templates/boards/base.html
+++ b/boards/templates/boards/base.html
@@ -34,7 +34,7 @@
     <a class="link" href="{% url 'index' %}">{% trans "All threads" %}</a>
     {% for tag in tags %}
         <a class="tag" href="{% url 'tag' tag_name=tag.name %}"
-                >{{ tag.name }}</a>
+                >#{{ tag.name }}</a>
     {% endfor %}
     <a class="tag" href="{% url 'tags' %}" title="{% trans 'Tag management' %}"
             >[...]</a>
diff --git a/boards/templates/boards/tags.html b/boards/templates/boards/tags.html
--- a/boards/templates/boards/tags.html
+++ b/boards/templates/boards/tags.html
@@ -20,13 +20,13 @@
                     class="not_fav">★</a>
             {% endif %}
             <a class="tag" href="{% url 'tag' tag.name %}">
-                {{ tag.name }}</a>
+                #{{ tag.name }}</a>
             ({{ tag.get_post_count }} {% trans 'threads' %})
             {% if tag.linked %}
                 ( +
                 {% for linked_tag in tag.get_linked_tags %}
                     <a class="tag" href="{% url 'tag' linked_tag.name %}">
-                        {{ linked_tag.name }}
+                        #{{ linked_tag.name }}
                     </a>
                 {% endfor %}
                 )