diff --git a/js/app.js b/js/app.js
index 6fdfd35..c50caf5 100644
--- a/js/app.js
+++ b/js/app.js
@@ -1,6 +1,6 @@
 //js/app.js
 import { LosslessAPI } from './api.js';
-import { apiSettings, themeManager, nowPlayingSettings, downloadQualitySettings } from './storage.js';
+import { apiSettings, themeManager, nowPlayingSettings, downloadQualitySettings, sidebarSettings } from './storage.js';
 import { UIRenderer } from './ui.js';
 import { Player } from './player.js';
 import { MultiScrobbler } from './multi-scrobbler.js';
@@ -313,6 +313,9 @@ document.addEventListener('DOMContentLoaded', async () => {
     const currentTheme = themeManager.getTheme();
     themeManager.setTheme(currentTheme);
 
+    // Restore sidebar state
+    sidebarSettings.restoreState();
+
     initializeSettings(scrobbler, player, api, ui);
     initializePlayerEvents(player, audioPlayer, scrobbler, ui);
     initializeTrackInteractions(
@@ -405,6 +408,8 @@ document.addEventListener('DOMContentLoaded', async () => {
                 ? '<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="m9 18 6-6-6-6"/></svg>'
                 : '<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="m15 18-6-6 6-6"/></svg>';
         }
+        // Save sidebar state to localStorage
+        sidebarSettings.setCollapsed(isCollapsed);
     });
 
     document.getElementById('nav-back')?.addEventListener('click', () => {
diff --git a/js/storage.js b/js/storage.js
index 5990ff8..9a369e1 100644
--- a/js/storage.js
+++ b/js/storage.js
@@ -812,6 +812,34 @@ export const equalizerSettings = {
     },
 };
 
+export const sidebarSettings = {
+    STORAGE_KEY: 'monochrome-sidebar-collapsed',
+
+    isCollapsed() {
+        try {
+            return localStorage.getItem(this.STORAGE_KEY) === 'true';
+        } catch {
+            return false;
+        }
+    },
+
+    setCollapsed(collapsed) {
+        localStorage.setItem(this.STORAGE_KEY, collapsed ? 'true' : 'false');
+    },
+
+    restoreState() {
+        const isCollapsed = this.isCollapsed();
+        if (isCollapsed) {
+            document.body.classList.add('sidebar-collapsed');
+            const toggleBtn = document.getElementById('sidebar-toggle');
+            if (toggleBtn) {
+                toggleBtn.innerHTML =
+                    '<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="m9 18 6-6-6-6"/></svg>';
+            }
+        }
+    },
+};
+
 export const queueManager = {
     STORAGE_KEY: 'monochrome-queue',