diff --git a/docs/login.md b/docs/login.md
index 55ca69e..3a92ae4 100644
--- a/docs/login.md
+++ b/docs/login.md
@@ -7,6 +7,7 @@ The broader access model is documented in [Access and Permissions](access.md).
 ## Fields
 - **Username**: Enter your admin username.
 - **Password**: Enter your password.
+- **Remember me on this browser**: Keeps the admin session after the browser is closed.
 
 ## Features
 - **Validation**: Both fields are required.
@@ -17,6 +18,8 @@ The broader access model is documented in [Access and Permissions](access.md).
 - Only administrators can log in to the management interface.
 - Non-admin users are shown an error message and cannot access the interface.
 - After successful login, users are redirected to the Dashboard.
+- If **Remember me on this browser** is not checked, the login uses a normal browser session cookie.
+- If **Remember me on this browser** is checked, the signed session cookie lasts for 14 days. The app does not store the password in the browser, and protected pages still check that the signed-in user is still an administrator.
 
 ---
 
diff --git a/simple_safer_server/app_factory.py b/simple_safer_server/app_factory.py
index 79a6e9d..9879f36 100644
--- a/simple_safer_server/app_factory.py
+++ b/simple_safer_server/app_factory.py
@@ -1,5 +1,6 @@
 import logging
 import os
+from datetime import timedelta
 from logging.handlers import RotatingFileHandler
 
 from flask import (
@@ -53,6 +54,8 @@
     UnauthorizedProblem,
 )
 
+REMEMBER_ME_SESSION_DAYS = 14
+
 
 def create_app() -> Flask:
     runtime = get_runtime()
@@ -61,6 +64,10 @@ def create_app() -> Flask:
     # Keep the session secret stable across deploys so a restart does not
     # invalidate every login cookie when the app's config directory persists.
     app.secret_key = get_flask_secret_key(runtime)
+    # "Remember me" uses Flask's normal signed session cookie. No password or
+    # separate login token is stored, and protected pages still re-check admin
+    # status on each request in case roles change after sign-in.
+    app.permanent_session_lifetime = timedelta(days=REMEMBER_ME_SESSION_DAYS)
     user_manager = UserManager(runtime=runtime)
 
     system_utils = SystemUtils(runtime=runtime)
@@ -208,6 +215,7 @@ def login():
 
             if user_manager.verify_user(username, password):
                 if user_manager.is_admin(username):
+                    session.permanent = request.form.get("remember_me") == "on"
                     session["username"] = username
                     session.pop("skip_login_disabled", None)
                     if request.accept_mimetypes.best == "application/json":
diff --git a/static/css/login.css b/static/css/login.css
index dce7ac0..1986dde 100644
--- a/static/css/login.css
+++ b/static/css/login.css
@@ -152,6 +152,29 @@
     background: var(--bg-root);
 }
 
+.login-remember-option {
+    display: flex;
+    align-items: center;
+    gap: var(--sp-2);
+    margin: calc(-1 * var(--sp-1)) 0 var(--sp-5);
+    color: var(--text-secondary);
+    font-size: var(--text-sm);
+    line-height: 1.4;
+    cursor: pointer;
+    user-select: none;
+}
+
+.login-remember-checkbox {
+    width: 16px;
+    height: 16px;
+    flex: 0 0 auto;
+    accent-color: var(--accent);
+}
+
+.login-remember-option:focus-within {
+    color: var(--text-primary);
+}
+
 .login-form .btn-submit {
     margin-top: var(--sp-2);
     height: 48px;
diff --git a/templates/login.html b/templates/login.html
index 47e94c7..3f73aa0 100644
--- a/templates/login.html
+++ b/templates/login.html
@@ -55,6 +55,11 @@ <h1 class="login-brand-title">SimpleSaferServer</h1>
                     <label for="password" class="form-label">Password</label>
                     <input id="password" name="password" type="password" required class="form-control" placeholder="Enter your password" autocomplete="current-password">
                 </div>
+
+                <label class="login-remember-option" for="remember_me">
+                    <input id="remember_me" name="remember_me" type="checkbox" class="login-remember-checkbox">
+                    <span>Remember me on this browser</span>
+                </label>
                 
                 <button type="submit" id="loginSubmitBtn" class="btn btn-primary btn-block btn-submit">
                     <i class="fas fa-right-to-bracket me-2"></i> Sign in
diff --git a/tests/test_app_factory_routes.py b/tests/test_app_factory_routes.py
index b8b568e..8291467 100644
--- a/tests/test_app_factory_routes.py
+++ b/tests/test_app_factory_routes.py
@@ -208,6 +208,82 @@ def test_login_title_uses_configured_hostname_without_auto_login():
         runtime._fake_state = previous_fake_state
 
 
+def test_login_form_includes_remember_me_checkbox():
+    previous_runtime = runtime._runtime
+    previous_fake_state = runtime._fake_state
+    try:
+        with TemporaryDirectory() as temp_dir:
+            app = _create_fake_app(temp_dir, skip_login=False)
+            _finish_fake_setup(app)
+
+            with app.test_client() as client:
+                response = client.get("/login")
+
+            page = response.get_data(as_text=True)
+            assert response.status_code == 200
+            assert 'name="remember_me"' in page
+            assert "Remember me on this browser" in page
+    finally:
+        runtime._runtime = previous_runtime
+        runtime._fake_state = previous_fake_state
+
+
+def test_login_without_remember_me_uses_browser_session_cookie():
+    previous_runtime = runtime._runtime
+    previous_fake_state = runtime._fake_state
+    try:
+        with TemporaryDirectory() as temp_dir:
+            app = _create_fake_app(temp_dir, skip_login=False)
+            _finish_fake_setup(app)
+
+            with app.test_client() as client:
+                response = client.post(
+                    "/login",
+                    data={"username": "admin", "password": "password"},
+                )
+
+                with client.session_transaction() as session:
+                    assert session["username"] == "admin"
+                    assert session.permanent is False
+
+            assert response.status_code == 302
+            assert "Expires=" not in response.headers["Set-Cookie"]
+    finally:
+        runtime._runtime = previous_runtime
+        runtime._fake_state = previous_fake_state
+
+
+def test_login_with_remember_me_sets_permanent_session_cookie():
+    previous_runtime = runtime._runtime
+    previous_fake_state = runtime._fake_state
+    try:
+        with TemporaryDirectory() as temp_dir:
+            app = _create_fake_app(temp_dir, skip_login=False)
+            _finish_fake_setup(app)
+
+            with app.test_client() as client:
+                response = client.post(
+                    "/login",
+                    data={
+                        "username": "admin",
+                        "password": "password",
+                        "remember_me": "on",
+                    },
+                    headers={"Accept": "application/json"},
+                )
+
+                with client.session_transaction() as session:
+                    assert session["username"] == "admin"
+                    assert session.permanent is True
+
+            assert response.status_code == 200
+            assert response.get_json()["data"]["redirect"] == "/dashboard"
+            assert "Expires=" in response.headers["Set-Cookie"]
+    finally:
+        runtime._runtime = previous_runtime
+        runtime._fake_state = previous_fake_state
+
+
 def test_setup_title_keeps_product_name_before_server_name_is_chosen():
     previous_runtime = runtime._runtime
     previous_fake_state = runtime._fake_state