diff --git a/editions/tw5.com/tiddlers/system/netlify-build-badge.tid b/editions/tw5.com/tiddlers/system/netlify-build-badge.tid
new file mode 100644
index 000000000..b0cd272c0
--- /dev/null
+++ b/editions/tw5.com/tiddlers/system/netlify-build-badge.tid
@@ -0,0 +1,17 @@
+title: $:/_tw5.com/netlify-build-badge
+tags: $:/tags/SideBarSegment
+list-after: $:/core/ui/SideBarSegments/site-subtitle
+
+<% if [{$:/build}prefix[NETLIFY-BUILD]] %>
+	<p>
+		<div class="tc-scary-warning" style="display: flex;gap: 0.5em;padding: 1em;margin-right: 1em;align-items: center;">
+			<div style="">
+				<a href="https://www.netlify.com" rel="noopener noreferrer" target="_blank"><img src="https://www.netlify.com/v3/img/components/netlify-light.svg" alt="Deploys by Netlify" /></a>
+			</div>
+			<div style="">
+				This is a preview build of the pull request <a href={{{ [{$:/build}split[|]nth[5]addprefix[https://github.com/TiddlyWiki/TiddlyWiki5/pull/]] }}} rel="noopener noreferrer" target="_blank">#<$text text={{{ [{$:/build}split[|]nth[5]] }}}/></a>
+			</div>
+		</div>
+	</p>
+<% endif %>
+