diff --git a/.playwright-mcp/sidebar-check-2.png b/.playwright-mcp/sidebar-check-2.png
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index 0000000..202a95f
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diff --git a/.playwright-mcp/sidebar-check.png b/.playwright-mcp/sidebar-check.png
new file mode 100644
index 0000000..ce65898
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diff --git a/ts_web/elements/wcc-dashboard.ts b/ts_web/elements/wcc-dashboard.ts
index e3814d3..72ccc29 100644
--- a/ts_web/elements/wcc-dashboard.ts
+++ b/ts_web/elements/wcc-dashboard.ts
@@ -66,6 +66,10 @@ export class WccDashboard extends DeesElement {
   @property({ attribute: false })
   accessor pinnedItems: Set<string> = new Set();
 
+  // Sidebar width (resizable)
+  @property({ type: Number })
+  accessor sidebarWidth: number = 200;
+
   // Derived from selectedViewport - no need for separate property
   public get isNative(): boolean {
     return this.selectedViewport === 'native';
@@ -127,6 +131,7 @@ export class WccDashboard extends DeesElement {
         .selectedItem=${this.selectedItem}
         .searchQuery=${this.searchQuery}
         .pinnedItems=${this.pinnedItems}
+        .sidebarWidth=${this.sidebarWidth}
         .isNative=${this.isNative}
         @selectedType=${(eventArg) => {
           this.selectedType = eventArg.detail;
@@ -145,6 +150,15 @@ export class WccDashboard extends DeesElement {
           this.pinnedItems = eventArg.detail;
           this.updateUrlWithScrollState();
         }}
+        @widthChanged=${async (eventArg: CustomEvent) => {
+          this.sidebarWidth = eventArg.detail;
+          this.updateUrlWithScrollState();
+          const frame = await this.wccFrame;
+          if (frame) {
+            frame.sidebarWidth = eventArg.detail;
+            frame.requestUpdate();
+          }
+        }}
       ></wcc-sidebar>
       <wcc-properties
         .dashboardRef=${this}
@@ -153,6 +167,7 @@ export class WccDashboard extends DeesElement {
         .selectedViewport=${this.selectedViewport}
         .selectedTheme=${this.selectedTheme}
         .isNative=${this.isNative}
+        .sidebarWidth=${this.sidebarWidth}
         @selectedViewport=${(eventArg) => {
           this.selectedViewport = eventArg.detail;
           this.scheduleUpdate();
@@ -171,7 +186,7 @@ export class WccDashboard extends DeesElement {
           this.toggleNative();
         }}
       ></wcc-properties>
-      <wcc-frame id="wccFrame" viewport=${this.selectedViewport} .isNative=${this.isNative}>
+      <wcc-frame id="wccFrame" viewport=${this.selectedViewport} .isNative=${this.isNative} .sidebarWidth=${this.sidebarWidth}>
       </wcc-frame>
     `;
   }
@@ -247,6 +262,7 @@ export class WccDashboard extends DeesElement {
           const frameScrollY = routeInfo.queryParams.frameScrollY;
           const sidebarScrollY = routeInfo.queryParams.sidebarScrollY;
           const pinned = routeInfo.queryParams.pinned;
+          const sidebarWidth = routeInfo.queryParams.sidebarWidth;
 
           if (search) {
             this.searchQuery = search;
@@ -269,10 +285,19 @@ export class WccDashboard extends DeesElement {
           } else if (this.pinnedItems.size > 0) {
             this.pinnedItems = new Set();
           }
+          if (sidebarWidth) {
+            this.sidebarWidth = parseInt(sidebarWidth, 10);
+          }
 
-          // Apply scroll positions after a short delay to ensure DOM is ready
-          setTimeout(() => {
+          // Apply scroll positions and update frame after a short delay to ensure DOM is ready
+          setTimeout(async () => {
             this.applyScrollPositions();
+            // Ensure frame gets the sidebarWidth
+            const frame = await this.wccFrame;
+            if (frame) {
+              frame.sidebarWidth = this.sidebarWidth;
+              frame.requestUpdate();
+            }
           }, 100);
         } else {
           this.searchQuery = '';
@@ -326,6 +351,7 @@ export class WccDashboard extends DeesElement {
           const frameScrollY = routeInfo.queryParams.frameScrollY;
           const sidebarScrollY = routeInfo.queryParams.sidebarScrollY;
           const pinned = routeInfo.queryParams.pinned;
+          const sidebarWidth = routeInfo.queryParams.sidebarWidth;
 
           if (search) {
             this.searchQuery = search;
@@ -348,6 +374,9 @@ export class WccDashboard extends DeesElement {
           } else if (this.pinnedItems.size > 0) {
             this.pinnedItems = new Set();
           }
+          if (sidebarWidth) {
+            this.sidebarWidth = parseInt(sidebarWidth, 10);
+          }
 
           // Apply scroll positions after a short delay to ensure DOM is ready
           setTimeout(() => {
@@ -444,6 +473,9 @@ export class WccDashboard extends DeesElement {
     if (this.pinnedItems.size > 0) {
       queryParams.set('pinned', Array.from(this.pinnedItems).join(','));
     }
+    if (this.sidebarWidth !== 200) {
+      queryParams.set('sidebarWidth', this.sidebarWidth.toString());
+    }
 
     const queryString = queryParams.toString();
     const fullUrl = queryString ? `${baseUrl}?${queryString}` : baseUrl;
@@ -507,6 +539,9 @@ export class WccDashboard extends DeesElement {
     if (this.pinnedItems.size > 0) {
       queryParams.set('pinned', Array.from(this.pinnedItems).join(','));
     }
+    if (this.sidebarWidth !== 200) {
+      queryParams.set('sidebarWidth', this.sidebarWidth.toString());
+    }
 
     const queryString = queryParams.toString();
     const fullUrl = queryString ? `${baseUrl}?${queryString}` : baseUrl;
diff --git a/ts_web/elements/wcc-frame.ts b/ts_web/elements/wcc-frame.ts
index 33386c6..e44d106 100644
--- a/ts_web/elements/wcc-frame.ts
+++ b/ts_web/elements/wcc-frame.ts
@@ -19,13 +19,15 @@ export class WccFrame extends DeesElement {
   @property({ type: Boolean })
   accessor isNative: boolean = false;
 
+  @property({ type: Number })
+  accessor sidebarWidth: number = 200;
+
   public static styles = [
     css`
       :host {
         border: 10px solid #ffaeaf;
         position: absolute;
         background: ${cssManager.bdTheme('#333', '#000')};
-        left: 200px;
         right: 0px;
         top: 0px;
         overflow-y: auto;
@@ -55,7 +57,7 @@ export class WccFrame extends DeesElement {
           ` : `
             bottom: ${this.advancedEditorOpen ? '400px' : '100px'};
             border: 10px solid #ffaeaf;
-            left: 200px;
+            left: ${this.sidebarWidth}px;
           `}
           transition: all 0.3s ease;
           ${this.isNative ? 'padding: 0px;' : (() => {
@@ -67,19 +69,19 @@ export class WccFrame extends DeesElement {
             case 'tablet':
               return `
                   padding: 0px ${
-                    (document.body.clientWidth - 200 - domtools.breakpoints.tablet) / 2
+                    (document.body.clientWidth - this.sidebarWidth - domtools.breakpoints.tablet) / 2
                   }px;
                 `;
             case 'phablet':
               return `
                   padding: 0px ${
-                    (document.body.clientWidth - 200 - domtools.breakpoints.phablet) / 2
+                    (document.body.clientWidth - this.sidebarWidth - domtools.breakpoints.phablet) / 2
                   }px;
                 `;
             case 'phone':
               return `
                   padding: 0px ${
-                    (document.body.clientWidth - 200 - domtools.breakpoints.phone) / 2
+                    (document.body.clientWidth - this.sidebarWidth - domtools.breakpoints.phone) / 2
                   }px;
                 `;
           }
diff --git a/ts_web/elements/wcc-properties.ts b/ts_web/elements/wcc-properties.ts
index c6987da..760ff0f 100644
--- a/ts_web/elements/wcc-properties.ts
+++ b/ts_web/elements/wcc-properties.ts
@@ -37,6 +37,9 @@ export class WccProperties extends DeesElement {
   @property()
   accessor isNative: boolean = false;
 
+  @property({ type: Number })
+  accessor sidebarWidth: number = 200;
+
   @state()
   accessor propertyContent: TemplateResult[] = [];
 
@@ -89,7 +92,7 @@ export class WccProperties extends DeesElement {
           font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
           box-sizing: border-box;
           position: absolute;
-          left: 200px;
+          left: ${this.sidebarWidth}px;
           height: ${this.editingProperties.length > 0 ? 100 + this.editorHeight : 100}px;
           bottom: 0px;
           right: 0px;
diff --git a/ts_web/elements/wcc-sidebar.ts b/ts_web/elements/wcc-sidebar.ts
index b2439e7..866fd7e 100644
--- a/ts_web/elements/wcc-sidebar.ts
+++ b/ts_web/elements/wcc-sidebar.ts
@@ -36,6 +36,14 @@ export class WccSidebar extends DeesElement {
   @property({ attribute: false })
   accessor pinnedItems: Set<string> = new Set();
 
+  // Sidebar width (resizable)
+  @property({ type: Number })
+  accessor sidebarWidth: number = 200;
+
+  // Track if currently resizing
+  @state()
+  accessor isResizing: boolean = false;
+
   private sectionsInitialized = false;
 
   public render(): TemplateResult {
@@ -66,7 +74,7 @@ export class WccSidebar extends DeesElement {
           box-sizing: border-box;
           position: absolute;
           left: 0px;
-          width: 200px;
+          width: ${this.sidebarWidth}px;
           top: 0px;
           bottom: 0px;
           overflow-y: auto;
@@ -360,6 +368,27 @@ export class WccSidebar extends DeesElement {
           margin-left: 0.25rem;
           margin-right: 0.25rem;
         }
+
+        /* Resize handle */
+        .resize-handle {
+          position: absolute;
+          top: 0;
+          right: 0;
+          bottom: 0;
+          width: 4px;
+          cursor: col-resize;
+          background: transparent;
+          transition: background 0.15s ease;
+          z-index: 10;
+        }
+
+        .resize-handle:hover {
+          background: rgba(59, 130, 246, 0.3);
+        }
+
+        .resize-handle.active {
+          background: var(--primary);
+        }
       </style>
       <div class="search-container">
         <input
@@ -374,6 +403,10 @@ export class WccSidebar extends DeesElement {
         ${this.renderPinnedSection()}
         ${this.renderSections()}
       </div>
+      <div
+        class="resize-handle ${this.isResizing ? 'active' : ''}"
+        @mousedown=${this.startResize}
+      ></div>
     `;
   }
 
@@ -723,6 +756,42 @@ export class WccSidebar extends DeesElement {
     }
   }
 
+  // ============ Resize functionality ============
+
+  private startResize = (e: MouseEvent) => {
+    e.preventDefault();
+    this.isResizing = true;
+    const startX = e.clientX;
+    const startWidth = this.sidebarWidth;
+
+    // Cache references once at start
+    const frame = this.dashboardRef?.shadowRoot?.querySelector('wcc-frame') as any;
+    const properties = this.dashboardRef?.shadowRoot?.querySelector('wcc-properties') as any;
+
+    const onMouseMove = (e: MouseEvent) => {
+      const newWidth = Math.min(400, Math.max(150, startWidth + (e.clientX - startX)));
+      this.sidebarWidth = newWidth;
+      // Update frame and properties directly
+      if (frame) {
+        frame.sidebarWidth = newWidth;
+      }
+      if (properties) {
+        properties.sidebarWidth = newWidth;
+      }
+    };
+
+    const onMouseUp = () => {
+      this.isResizing = false;
+      document.removeEventListener('mousemove', onMouseMove);
+      document.removeEventListener('mouseup', onMouseUp);
+      // Dispatch event on release for URL persistence
+      this.dispatchEvent(new CustomEvent('widthChanged', { detail: this.sidebarWidth }));
+    };
+
+    document.addEventListener('mousemove', onMouseMove);
+    document.addEventListener('mouseup', onMouseUp);
+  };
+
   public selectItem(
     typeArg: TElementType,
     itemNameArg: string,