diff --git a/source/nodejs/adaptivecards-designer/src/card-designer.ts b/source/nodejs/adaptivecards-designer/src/card-designer.ts
index fe08201c4d..865fe308ca 100644
--- a/source/nodejs/adaptivecards-designer/src/card-designer.ts
+++ b/source/nodejs/adaptivecards-designer/src/card-designer.ts
@@ -855,7 +855,7 @@ export class CardDesigner extends Designer.DesignContext {
             }
 
             this._hostContainerChoicePicker.onChanged = (sender) => {
-                this.hostContainer = this._hostContainers[parseInt(this._hostContainerChoicePicker.value)];
+                this.setHostContainerByIndex(parseInt(this._hostContainerChoicePicker.value));
             };
 
             this.toolbar.addElement(this._hostContainerChoicePicker);
@@ -1713,6 +1713,14 @@ export class CardDesigner extends Designer.DesignContext {
         this.setCardPayload(card, true);
     }
 
+	setHostContainerByIndex(hostContainerIndex: number){
+		if (hostContainerIndex < 0 || this._hostContainers.length < hostContainerIndex) {
+			return;
+		}
+
+		this.hostContainer = this._hostContainers[hostContainerIndex];
+	}
+
     onCardPayloadChanged: (designer: CardDesigner) => void;
     onCardValidated: (designer: CardDesigner, validationLogEntries: Adaptive.IValidationEvent[]) => void;
     onActiveHostContainerChanged: (designer: CardDesigner) => void;
diff --git a/source/nodejs/adaptivecards-site/themes/adaptivecards/layout/designer.ejs b/source/nodejs/adaptivecards-site/themes/adaptivecards/layout/designer.ejs
index be99a26bf4..85d5cf7f7d 100644
--- a/source/nodejs/adaptivecards-site/themes/adaptivecards/layout/designer.ejs
+++ b/source/nodejs/adaptivecards-site/themes/adaptivecards/layout/designer.ejs
@@ -144,9 +144,14 @@
 			designer.attachTo(document.getElementById("designerRootHost"));
 			designer.monacoModuleLoaded();
 
+			var hostContainerIndexParam = getParameterByName("hostContainerIndex", null);
 			var cardUrl = getParameterByName("card", null);
 			var dataUrl = getParameterByName("data", null);
 
+			if (hostContainerIndexParam) {
+				designer.setHostContainerByIndex(parseInt(hostContainerIndexParam))
+			}
+
 			if (dataUrl) {
 				var dataXhttp = new XMLHttpRequest();
 				dataXhttp.onload = function () {