diff --git a/php/public/domain-prefill.js b/php/public/domain-prefill.js
new file mode 100644
index 00000000..c81f2231
--- /dev/null
+++ b/php/public/domain-prefill.js
@@ -0,0 +1,7 @@
+document.addEventListener("DOMContentLoaded", function(event) {
+    // domain
+    let domain = document.getElementById("domain_input");
+    if (domain) {
+        domain.value = window.location.host
+    }
+});
diff --git a/php/templates/containers.twig b/php/templates/containers.twig
index 4249cb2e..a885646f 100644
--- a/php/templates/containers.twig
+++ b/php/templates/containers.twig
@@ -20,6 +20,9 @@
 
         {# Add 2nd tab warning #}
         <script type="text/javascript" src="second-tab-warning.js"></script>
+        
+        {# Add domain-prefill #}
+        <script type="text/javascript" src="domain-prefill.js"></script>
 
         {% set isAnyRunning = false %}
         {% set isAnyRestarting = false %}
@@ -100,7 +103,7 @@
                             <b>Please note:</b> The domain validation is disabled so any domain will be accepted here! So make sure that you do not make a typo here as you will not be able to change it afterwards!<br><br>
                         {% endif %}
                         <form method="POST" action="/api/configuration" class="xhr">
-                            <input type="text" name="domain" value="{{ domain }}" placeholder="nextcloud.yourdomain.com"/>
+                            <input type="text" id="domain_input" name="domain" value="{{ domain }}" placeholder="nextcloud.yourdomain.com"/>
                             <input type="hidden" name="{{csrf.keys.name}}" value="{{csrf.name}}">
                             <input type="hidden" name="{{csrf.keys.value}}" value="{{csrf.value}}">
                             <input class="button" type="submit" value="Submit domain" />