diff --git a/app/controllers/sessions_controller.rb b/app/controllers/sessions_controller.rb
index eb290d37e..fed96b56e 100644
--- a/app/controllers/sessions_controller.rb
+++ b/app/controllers/sessions_controller.rb
@@ -5,6 +5,22 @@ class SessionsController < ApplicationController
   layout "auth"
 
   def new
+    begin
+      demo = Rails.application.config_for(:demo)
+      @prefill_demo_credentials = demo_host_match?(demo)
+      if @prefill_demo_credentials
+        @email = params[:email].presence || demo["email"]
+        @password = params[:password].presence || demo["password"]
+      else
+        @email = params[:email]
+        @password = params[:password]
+      end
+    rescue RuntimeError, Errno::ENOENT, Psych::SyntaxError
+      # Demo config file missing or malformed - disable demo credential prefilling
+      @prefill_demo_credentials = false
+      @email = params[:email]
+      @password = params[:password]
+    end
   end
 
   def create
@@ -75,4 +91,10 @@ class SessionsController < ApplicationController
     def set_session
       @session = Current.user.sessions.find(params[:id])
     end
+
+    def demo_host_match?(demo)
+      return false unless demo.present? && demo["hosts"].present?
+
+      demo["hosts"].include?(request.host)
+    end
 end
diff --git a/app/views/sessions/new.html.erb b/app/views/sessions/new.html.erb
index 5d5774349..336547490 100644
--- a/app/views/sessions/new.html.erb
+++ b/app/views/sessions/new.html.erb
@@ -2,10 +2,38 @@
   header_title t(".title")
 %>
 
-<%= styled_form_with url: sessions_path, class: "space-y-4", data: { turbo: false } do |form| %>
-  <%= form.email_field :email, label: t(".email"), autofocus: false, autocomplete: "email", required: "required", placeholder: t(".email_placeholder") %>
+<% if @prefill_demo_credentials %>
+  <div class="mb-4 rounded-lg border bg-blue-50 text-blue-700 border-blue-200 theme-dark:bg-blue-900/20 theme-dark:text-blue-400 theme-dark:border-blue-800 p-4" role="status" aria-live="polite">
+    <div class="flex items-start gap-3">
+      <div class="shrink-0">
+        <%= icon "info", size: "sm", color: "blue-600" %>
+      </div>
+      <div class="flex-1 text-sm">
+        <h3 class="font-semibold mb-1">
+          <%= t(".demo_banner_title") %>
+        </h3>
+        <p>
+          <%= t(".demo_banner_message") %>
+        </p>
+      </div>
+    </div>
+  </div>
+<% end %>
 
-  <%= form.password_field :password, label: t(".password"), required: "required", placeholder: t(".password_placeholder") %>
+<%= styled_form_with url: sessions_path, class: "space-y-4", data: { turbo: false } do |form| %>
+  <%= form.email_field :email,
+                       label: t(".email"),
+                       autofocus: false,
+                       autocomplete: "email",
+                       required: "required",
+                       placeholder: t(".email_placeholder"),
+                       value: @email %>
+
+  <%= form.password_field :password,
+                          label: t(".password"),
+                          required: "required",
+                          placeholder: t(".password_placeholder"),
+                          value: @password %>
 
   <%= form.submit t(".submit") %>
 <% end %>
diff --git a/config/demo.yml b/config/demo.yml
new file mode 100644
index 000000000..330d57a20
--- /dev/null
+++ b/config/demo.yml
@@ -0,0 +1,15 @@
+default: &default
+  hosts:
+    - sure-demo.pikapod.net
+    - demo.sure.am
+  email: user@example.com
+  password: Password1!
+
+development:
+  <<: *default
+
+test:
+  <<: *default
+
+production:
+  <<: *default
diff --git a/config/locales/views/sessions/en.yml b/config/locales/views/sessions/en.yml
index 589f9f3cc..98a6ecd9a 100644
--- a/config/locales/views/sessions/en.yml
+++ b/config/locales/views/sessions/en.yml
@@ -19,3 +19,5 @@ en:
       password_placeholder: Enter your password
       openid_connect: Sign in with OpenID Connect
       google_auth_connect: Sign in with Google
+      demo_banner_title: "Demo Mode Active"
+      demo_banner_message: "This is a demonstration environment. Login credentials have been pre-filled for your convenience. Please do not enter real or sensitive information."