diff --git a/client_plugins/default_hostname_setter/main.js b/client_plugins/default_hostname_setter/main.js
new file mode 100644
index 0000000..a74b5e3
--- /dev/null
+++ b/client_plugins/default_hostname_setter/main.js
@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2025 The Foundry Visionmongers Ltd.  All Rights Reserved.
+ */
+
+/**
+ * Set your default hostname here.
+ */
+const DEFAULT_HOST_NAME = 'your-default-hostname.com'
+
+/**
+ * Sets the default hostname in the hostname input when on the login page and the input value is empty.
+ */
+function setDefaultHostname() {
+    if (!window.location.href.includes('login')) {
+        return;
+    }
+
+    const hostInput = document.querySelector('input#login_hostname');
+    if (!hostInput) {
+        console.warn('Default Hostname Setter: No hostname input found found.');
+        return;
+    }
+
+    if (hostInput.value.trim() === '') {
+        hostInput.value = DEFAULT_HOST_NAME;
+        console.info('Default Hostname Setter: Hostname set.');
+    }
+}
+
+if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', setDefaultHostname);
+} else {
+    setDefaultHostname();
+}
+
diff --git a/client_plugins/default_hostname_setter/manifest.json b/client_plugins/default_hostname_setter/manifest.json
new file mode 100644
index 0000000..c4b593d
--- /dev/null
+++ b/client_plugins/default_hostname_setter/manifest.json
@@ -0,0 +1,13 @@
+{
+    "name": "Default Hostname Setter",
+    "version": "1.0",
+    "description": "Automatically sets a default hostname on the login page if hostname input value is empty.",
+    "content_scripts": [
+      {
+        "matches": ["file://*"],
+        "js": ["main.js"],
+        "run_at": "document_idle"
+      }
+    ],
+    "manifest_version": 3
+  }
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