diff --git a/dist/hpl-toolbox-0.1.8.exe b/dist/hpl-toolbox-0.1.8.exe
index dd15348..f0c3545 100644
Binary files a/dist/hpl-toolbox-0.1.8.exe and b/dist/hpl-toolbox-0.1.8.exe differ
diff --git a/dist/hpl-toolbox-0.1.8.vsix b/dist/hpl-toolbox-0.1.8.vsix
index e584dfc..fcde2d0 100644
Binary files a/dist/hpl-toolbox-0.1.8.vsix and b/dist/hpl-toolbox-0.1.8.vsix differ
diff --git a/standalone/layout.go b/standalone/layout.go
index 55d7f91..8069d53 100644
--- a/standalone/layout.go
+++ b/standalone/layout.go
@@ -25,30 +25,110 @@ const SharedCSS = `
   html { min-height: 100%; }
   body {
     min-height: 100vh;
-    display: flex;
-    flex-direction: column;
+    display: grid;
+    grid-template-columns: var(--sidebar-width, 236px) minmax(0, 1fr);
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
     background: #1e1e1e; color: #ddd;
     margin: 0; padding: 0;
   }
-  .topbar {
-    display: flex; align-items: center; gap: 8px;
-    padding: 8px 16px; background: #252526; border-bottom: 1px solid #333;
+  body.sidebar-collapsed { --sidebar-width: 56px; }
+  .sidebar {
+    position: sticky;
+    top: 0;
+    height: 100vh;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+    padding: 10px 8px;
+    background: #252526;
+    border-right: 1px solid #333;
     font-size: 13px;
+    overflow: hidden;
   }
-  .topbar .nav-link {
+  .sidebar-header {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    min-height: 32px;
+    padding: 0 2px 6px;
+    border-bottom: 1px solid #333;
+  }
+  .sidebar-title {
+    min-width: 0;
+    flex: 1;
+    color: #ddd;
+    font-size: 12px;
+    font-weight: 700;
+    letter-spacing: 0.45px;
+    text-transform: uppercase;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+  .sidebar-toggle {
+    width: 32px;
+    height: 28px;
+    padding: 0;
+    display: grid;
+    place-items: center;
+    background: transparent;
+    color: #ddd;
+    border: 1px solid #444;
+    border-radius: 4px;
+    font-size: 16px;
+    line-height: 1;
+  }
+  .sidebar-toggle:hover { background: #2a2d2e; }
+  .sidebar-nav {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+    min-height: 0;
+    overflow: auto;
+  }
+  .sidebar .nav-link {
+    width: 100%;
+    min-height: 34px;
+    display: grid;
+    grid-template-columns: 28px minmax(0, 1fr);
+    align-items: center;
+    gap: 8px;
     background: transparent;
     color: #ddd;
     border: 0;
-    padding: 5px 10px;
+    padding: 4px 8px 4px 4px;
     border-radius: 4px;
     cursor: pointer;
     font: inherit;
+    text-align: left;
+  }
+  .sidebar .nav-link:hover { background: #2a2d2e; }
+  .sidebar .nav-link.active { background: #094771; color: #fff; }
+  .nav-icon {
+    width: 28px;
+    height: 26px;
+    display: grid;
+    place-items: center;
+    border-radius: 4px;
+    background: rgba(128,128,128,0.12);
+    color: #ddd;
+    font-size: 11px;
+    font-weight: 700;
+    letter-spacing: 0;
+  }
+  .nav-text {
+    min-width: 0;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
   }
-  .topbar .nav-link:hover { background: #2a2d2e; }
-  .topbar .nav-link.active { background: #094771; color: #fff; }
   .beta-pill { margin-left: 4px; padding: 1px 4px; border: 1px solid #555; border-radius: 3px; font-size: 10px; opacity: 0.7; text-transform: uppercase; }
-  .topbar-spacer { margin-left: auto; }
+  .app-shell {
+    min-width: 0;
+    min-height: 100vh;
+    display: flex;
+    flex-direction: column;
+  }
   .content { flex: 1; width: 100%; padding: 18px; max-width: 1100px; margin: 0 auto; }
   .app-footer {
     width: 100%;
@@ -78,6 +158,28 @@ const SharedCSS = `
   .app-footer-version { opacity: 0.75; text-align: center; white-space: nowrap; }
   .app-footer-link { justify-self: end; padding: 0; background: transparent; color: #a7a7a7; border: 0; cursor: pointer; font: inherit; opacity: 0.72; }
   .app-footer-link:hover { background: transparent; opacity: 1; text-decoration: underline; }
+  body.sidebar-collapsed .sidebar { align-items: stretch; }
+  body.sidebar-collapsed .sidebar-title,
+  body.sidebar-collapsed .nav-text,
+  body.sidebar-collapsed .beta-pill { display: none; }
+  body.sidebar-collapsed .sidebar .nav-link {
+    grid-template-columns: 28px;
+    justify-content: center;
+    padding: 4px;
+  }
+  body.sidebar-collapsed .sidebar-header { justify-content: center; padding-left: 0; padding-right: 0; }
+  body.sidebar-collapsed .sidebar-toggle { width: 38px; }
+  @media (max-width: 760px) {
+    body { grid-template-columns: 1fr; }
+    .sidebar {
+      position: static;
+      height: auto;
+      max-height: 48vh;
+      border-right: 0;
+      border-bottom: 1px solid #333;
+    }
+    body.sidebar-collapsed .sidebar { max-height: 50px; }
+  }
   h2 { margin: 0; font-size: 18px; line-height: 1.25; font-weight: 600; }
   .tool-header { margin-bottom: var(--tool-gap-lg); }
   .tool-title { margin: 0; font-size: 18px; line-height: 1.25; font-weight: 600; }
@@ -366,6 +468,34 @@ func betaToolCount() int {
 	return count
 }
 
+func navInitials(label string) string {
+	switch label {
+	case "Base64 Scanner":
+		return "B64"
+	case "AppLovin Playable Preview":
+		return "APP"
+	case "Mintegral Checker":
+		return "MiC"
+	}
+	words := strings.Fields(label)
+	if len(words) == 0 {
+		return "?"
+	}
+	if len(words) == 1 {
+		r := []rune(words[0])
+		if len(r) == 0 {
+			return "?"
+		}
+		return strings.ToUpper(string(r[0]))
+	}
+	first := []rune(words[0])
+	second := []rune(words[1])
+	if len(first) == 0 || len(second) == 0 {
+		return strings.ToUpper(string([]rune(label)[0]))
+	}
+	return strings.ToUpper(string(first[0]) + string(second[0]))
+}
+
 func Page(activePath, title, body string) string {
 	cfg := LoadConfig()
 	betaToolsEnabled := cfg.BetaToolsEnabled
@@ -379,7 +509,7 @@ func Page(activePath, title, body string) string {
 		if n.Beta {
 			label += `<span class="beta-pill">Beta</span>`
 		}
-		tabs.WriteString(`<button type="button" class="nav-link` + cls + `" data-path="` + n.Path + `">` + label + `</button>`)
+		tabs.WriteString(`<button type="button" class="nav-link` + cls + `" data-path="` + n.Path + `" title="` + n.Label + `"><span class="nav-icon">` + navInitials(n.Label) + `</span><span class="nav-text">` + label + `</span></button>`)
 	}
 
 	betaButtonLabel := "Show beta"
@@ -394,14 +524,29 @@ func Page(activePath, title, body string) string {
 <style>` + SharedCSS + `</style>
 <script>` + SharedDropZoneScript + `</script>
 </head><body>
-<div class="topbar">` + tabs.String() + `<span class="topbar-spacer"></span></div>
-<div class="content">` + body + `</div>
-<div class="app-footer">
-  <button id="betaToolsToggle" class="beta-tools-toggle" data-enabled="` + boolAttr(betaToolsEnabled) + `">` + betaButtonLabel + `</button>
-  <span class="app-footer-version">` + AppVersion + ` - JJGC 00784</span>
-  <button type="button" class="app-footer-link" data-path="/changelog">Changelog</button>
+<aside class="sidebar">
+  <div class="sidebar-header">
+    <span class="sidebar-title">HPL Toolbox</span>
+    <button id="sidebarToggle" class="sidebar-toggle" title="Toggle sidebar" aria-label="Toggle sidebar">☰</button>
+  </div>
+  <nav class="sidebar-nav">` + tabs.String() + `</nav>
+</aside>
+<div class="app-shell">
+  <div class="content">` + body + `</div>
+  <div class="app-footer">
+    <button id="betaToolsToggle" class="beta-tools-toggle" data-enabled="` + boolAttr(betaToolsEnabled) + `">` + betaButtonLabel + `</button>
+    <span class="app-footer-version">` + AppVersion + ` - JJGC 00784</span>
+    <button type="button" class="app-footer-link" data-path="/changelog">Changelog</button>
+  </div>
 </div>
 <script>
+if (localStorage.getItem('hplSidebarCollapsed') === 'true') {
+  document.body.classList.add('sidebar-collapsed');
+}
+document.getElementById('sidebarToggle').addEventListener('click', () => {
+  const collapsed = document.body.classList.toggle('sidebar-collapsed');
+  localStorage.setItem('hplSidebarCollapsed', collapsed ? 'true' : 'false');
+});
 document.querySelectorAll('[data-path]').forEach((element) => {
   element.addEventListener('click', () => {
     const path = element.dataset.path;