diff --git a/config/mkdocs.common.yml b/config/mkdocs.common.yml
index e43b7d9f..71b49a02 100644
--- a/config/mkdocs.common.yml
+++ b/config/mkdocs.common.yml
@@ -19,6 +19,7 @@
 # IN THE SOFTWARE.
 
 extra:
+  context: !ENV [CONTEXT, "production"]
   social:
     - icon: simple/mastodon
       link: https://mastodon.neat.computer/@privacyguides
diff --git a/theme/main.html b/theme/main.html
index f05a188c..ed83e22e 100644
--- a/theme/main.html
+++ b/theme/main.html
@@ -60,4 +60,10 @@
     <a href="https://www.privacyguides.org/"> 
     <strong>Visit privacyguides.org for the latest version.</strong>
     </a>
+{% elif config.extra.context == "deploy-preview" %}
+    You're viewing an <strong>unreviewed preview</strong> of Privacy Guides built on {{ build_date_utc }}.
+    These previews are <strong>user-submitted</strong> and may not necessarily reflect the opinion of the site.
+    <a href="https://www.privacyguides.org/"> 
+    <strong>Visit privacyguides.org for current advice.</strong>
+    </a>
 {% else %}{% endif %}{% endblock %}