diff --git a/front/src/AppNavBar.vue b/front/src/AppNavBar.vue
index b74c5e3..bbae086 100644
--- a/front/src/AppNavBar.vue
+++ b/front/src/AppNavBar.vue
@@ -4,7 +4,7 @@
   import NavBarSearch from './NavBarSearch.vue'
   import BarcodeModal from './BarcodeModal.vue'
   import { useAuthStore } from './auth.store.js'
-  import { getAppInfo } from './api.js'
+  import { getAppInfo, postLogin } from './api.js'
   import { onMounted } from 'vue'
 
   const authStore = useAuthStore();
@@ -21,8 +21,23 @@
   const appInfo = ref(null);
   const appInfoErr = ref(null);
 
+   async function logInIfDemoMode(demoMode) {
+    if (!demoMode) {
+      return;
+    }
+
+    const demouser = ref({
+      username: "demo",
+      password: ""
+    });
+    const res = await postLogin(demouser)
+    const json = await res.json();
+    await useAuthStore().login({username: demouser.value.username, token: json["token"]})
+  }
+
   onMounted(() => {
-    getAppInfo(appInfo, appInfoErr);
+    getAppInfo(appInfo, appInfoErr)
+    .then(() => logInIfDemoMode(appInfo.value.demoMode));
   })
 </script>
 
@@ -62,7 +77,7 @@
         <RouterLink v-if="authStore.user" to="/add" class="navbar-item" activeClass="is-active">
           {{ $t('navbar.addbook')}}
         </RouterLink>
-        <div v-if="authStore.user" class="navbar-item is-hidden-desktop">
+        <div v-if="authStore.user && appInfo && !appInfo.demoMode" class="navbar-item is-hidden-desktop">
           <a @click="logout">
             {{ $t('navbar.logout')}}
             <span class="icon" :title="$t('navbar.logout')">
@@ -76,9 +91,9 @@
           <div >
             {{ authStore.user.username }}
           </div>
-            <a @click="logout" class="button is-light">
-              {{ $t('navbar.logout')}}
-            </a>
+          <a v-if="appInfo && !appInfo.demoMode" @click="logout" class="button is-light">
+            {{ $t('navbar.logout')}}
+          </a>
         </div>
         <div v-else class="navbar-item">
           <div class="buttons">
diff --git a/front/src/api.js b/front/src/api.js
index 128b717..c1babd1 100644
--- a/front/src/api.js
+++ b/front/src/api.js
@@ -34,8 +34,8 @@ function useFetch(data, error, url) {
   }
 }
 
-export function getAppInfo(appInfo, appInfoErr) {
-  fetch('/ws/appinfo', {
+export async function getAppInfo(appInfo, appInfoErr) {
+  return fetch('/ws/appinfo', {
     method: 'GET'
   }).then((res) => res.json())
   .then((json) => appInfo.value = json)
diff --git a/internal/apitest/get_appinfo_test.go b/internal/apitest/get_appinfo_test.go
index 8513126..c00a4b4 100644
--- a/internal/apitest/get_appinfo_test.go
+++ b/internal/apitest/get_appinfo_test.go
@@ -27,4 +27,5 @@ func TestGetAppInfo_Ok(t *testing.T) {
 	assert.Equal(t, http.StatusOK, w.Code)
 
 	assert.Equal(t, false, appInfo.RegistrationDisabled)
+	assert.Equal(t, false, appInfo.DemoMode)
 }
diff --git a/internal/config/config.go b/internal/config/config.go
index d73dc10..29644a5 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -19,6 +19,7 @@ type Config struct {
 	Limit               int    `toml:"limit" default:"100" comment:"A single API call will return at most this number of records."`
 	InventaireUrl       string `toml:"inventaire-url" default:"https://inventaire.io" comment:"An inventaire.io instance URL."`
 	DisableRegistration bool   `toml:"disable-registration" default:"false" comment:"Disable new account creation."`
+	DemoMode            bool   `toml:"demo-mode" default:"false" comment:"Activate demo mode: anyone connecting to the instance will be logged in as user 'demo'"`
 }
 
 func defaultConfig() Config {
@@ -31,6 +32,7 @@ func defaultConfig() Config {
 		Limit:               100,
 		InventaireUrl:       "https://inventaire.io",
 		DisableRegistration: false,
+		DemoMode:            false,
 	}
 }
 
diff --git a/internal/dto/out.go b/internal/dto/out.go
index 506ca7a..28381a1 100644
--- a/internal/dto/out.go
+++ b/internal/dto/out.go
@@ -2,6 +2,7 @@ package dto
 
 type AppInfo struct {
 	RegistrationDisabled bool `json:"registrationDisabled"`
+	DemoMode             bool `json:"demoMode"`
 }
 
 type BookGet struct {
diff --git a/internal/routes/appinfo.go b/internal/routes/appinfo.go
index b5215c8..e91c8ab 100644
--- a/internal/routes/appinfo.go
+++ b/internal/routes/appinfo.go
@@ -8,5 +8,8 @@ import (
 )
 
 func GetAppInfo(ac appcontext.AppContext) {
-	ac.C.JSON(http.StatusOK, dto.AppInfo{RegistrationDisabled: ac.Config.DisableRegistration})
+	ac.C.JSON(http.StatusOK, dto.AppInfo{
+		RegistrationDisabled: ac.Config.DisableRegistration,
+		DemoMode:             ac.Config.DemoMode,
+	})
 }
diff --git a/internal/routes/userlogin.go b/internal/routes/userlogin.go
index 4c724a8..14b297b 100644
--- a/internal/routes/userlogin.go
+++ b/internal/routes/userlogin.go
@@ -16,21 +16,29 @@ import (
 )
 
 func PostLoginHandler(ac appcontext.AppContext) {
-	var user dto.UserLogin
-	err := ac.C.ShouldBindJSON(&user)
-	if err != nil {
-		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
-		return
-	}
 
-	if !isUserAndPasswordOk(ac.Db, user.Username, user.Password) {
-		ac.C.JSON(http.StatusUnauthorized,
-			gin.H{"error": i18nresource.GetTranslatedMessage(&ac, "InvalidCredentials")})
-		return
+	var username string
+
+	if !ac.Config.DemoMode {
+		var user dto.UserLogin
+		err := ac.C.ShouldBindJSON(&user)
+		if err != nil {
+			myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+			return
+		}
+
+		if !ac.Config.DemoMode && !isUserAndPasswordOk(ac.Db, user.Username, user.Password) {
+			ac.C.JSON(http.StatusUnauthorized,
+				gin.H{"error": i18nresource.GetTranslatedMessage(&ac, "InvalidCredentials")})
+			return
+		}
+		username = user.Username
+	} else {
+		username = "demo"
 	}
 
 	var jwtToken string
-	jwtToken, err = jwtauth.GenerateJwtToken(user.Username)
+	jwtToken, err := jwtauth.GenerateJwtToken(username)
 	if err != nil {
 		ac.C.JSON(http.StatusUnauthorized,
 			gin.H{"error": fmt.Errorf("Error when generating JWT token: %w", err)})