diff --git a/packages/plugin-ai-generation-web/src/ui/common/renderStyleTransferProperty.ts b/packages/plugin-ai-generation-web/src/ui/common/renderStyleTransferProperty.ts
index 0766efce..690200a8 100644
--- a/packages/plugin-ai-generation-web/src/ui/common/renderStyleTransferProperty.ts
+++ b/packages/plugin-ai-generation-web/src/ui/common/renderStyleTransferProperty.ts
@@ -326,6 +326,9 @@ function getDefaultStyles(options: {
   includeNone?: boolean;
   cesdk?: CreativeEditorSDK;
 }): Style[] {
+  // Normalize: strip trailing slashes to prevent double slashes in URL concatenation
+  const baseURL = options.baseURL.replace(/\/+$/, '');
+
   return STYLES.map((style) => {
     if (style.id === 'none') {
       if (!options.includeNone) {
@@ -339,7 +342,7 @@ function getDefaultStyles(options: {
           style.labelKey
         ),
         prompt: style.prompt,
-        thumbUri: `${options.baseURL}/thumbnails/None.svg`
+        thumbUri: `${baseURL}/thumbnails/None.svg`
       };
     }
     return {
@@ -350,7 +353,7 @@ function getDefaultStyles(options: {
         style.labelKey
       ),
       prompt: style.prompt,
-      thumbUri: `${options.baseURL}/thumbnails/${style.id}.jpeg`
+      thumbUri: `${baseURL}/thumbnails/${style.id}.jpeg`
     };
   }).filter(isDefined);
 }
diff --git a/packages/plugin-ai-image-generation-web/src/open-ai/GptImage1.styles.ts b/packages/plugin-ai-image-generation-web/src/open-ai/GptImage1.styles.ts
index 4c07e92b..59135e7a 100644
--- a/packages/plugin-ai-image-generation-web/src/open-ai/GptImage1.styles.ts
+++ b/packages/plugin-ai-image-generation-web/src/open-ai/GptImage1.styles.ts
@@ -93,6 +93,9 @@ export const createStyleAssetSource = (
     includeNone?: boolean;
   }
 ) => {
+  // Normalize: strip trailing slashes to prevent double slashes in URL concatenation
+  const baseURL = options.baseURL.replace(/\/+$/, '');
+
   const styleValues = STYLES.map((style) => {
     if (style.id === 'none') {
       if (!options.includeNone) {
@@ -101,13 +104,13 @@ export const createStyleAssetSource = (
       return {
         id: style.id,
         label: style.label,
-        thumbUri: `${options.baseURL}/thumbnails/None.svg`
+        thumbUri: `${baseURL}/thumbnails/None.svg`
       };
     }
     return {
       id: style.id,
       label: style.label,
-      thumbUri: `${options.baseURL}/thumbnails/${style.id}.jpeg`
+      thumbUri: `${baseURL}/thumbnails/${style.id}.jpeg`
     };
   }).filter(isDefined);
 
diff --git a/packages/plugin-ai-image-generation-web/src/open-ai/quickActions/ChangeStyleLibrary.ts b/packages/plugin-ai-image-generation-web/src/open-ai/quickActions/ChangeStyleLibrary.ts
index 4fae09fa..ee995516 100644
--- a/packages/plugin-ai-image-generation-web/src/open-ai/quickActions/ChangeStyleLibrary.ts
+++ b/packages/plugin-ai-image-generation-web/src/open-ai/quickActions/ChangeStyleLibrary.ts
@@ -127,6 +127,9 @@ const createStyleAssetSource = (
     includeNone?: boolean;
   }
 ) => {
+  // Normalize: strip trailing slashes to prevent double slashes in URL concatenation
+  const baseURL = options.baseURL.replace(/\/+$/, '');
+
   const styleValues = STYLES.map((style) => {
     if (style.id === 'none') {
       if (!options.includeNone) {
@@ -135,13 +138,13 @@ const createStyleAssetSource = (
       return {
         id: style.id,
         label: style.label,
-        thumbUri: `${options.baseURL}/thumbnails/None.svg`
+        thumbUri: `${baseURL}/thumbnails/None.svg`
       };
     }
     return {
       id: style.id,
       label: style.label,
-      thumbUri: `${options.baseURL}/thumbnails/${style.id}.jpeg`
+      thumbUri: `${baseURL}/thumbnails/${style.id}.jpeg`
     };
   }).filter(isDefined);
 
diff --git a/packages/plugin-cutout-library-web/src/plugin.ts b/packages/plugin-cutout-library-web/src/plugin.ts
index e04d55d9..3bc8fb48 100644
--- a/packages/plugin-cutout-library-web/src/plugin.ts
+++ b/packages/plugin-cutout-library-web/src/plugin.ts
@@ -56,7 +56,9 @@ function addCutoutAssetLibraryEntry(
   cesdk: CreativeEditorSDK,
   config: Partial<PluginConfiguration> = DEFAULT_PLUGIN_CONFIGURATION
 ) {
-  const { assetBaseUri } = getPluginConfiguration(config);
+  const { assetBaseUri: rawAssetBaseUri } = getPluginConfiguration(config);
+  // Normalize: strip trailing slashes to prevent double slashes in URL concatenation
+  const assetBaseUri = rawAssetBaseUri.replace(/\/+$/, '');
   cesdk.ui.addAssetLibraryEntry({
     id: ENTRY_ID,
     sourceIds: [ASSET_SOURCE_ID],
@@ -72,13 +74,15 @@ function addCutoutAssetLibraryEntry(
 async function addCutoutAssetSource(
   cesdk: CreativeEditorSDK,
   {
-    assetBaseUri,
+    assetBaseUri: rawAssetBaseUri,
     createCutoutFromBlocks
   }: {
     assetBaseUri: string;
     createCutoutFromBlocks: CreateCutoutFromBlocks;
   }
 ) {
+  // Normalize: strip trailing slashes to prevent double slashes in URL concatenation
+  const assetBaseUri = rawAssetBaseUri.replace(/\/+$/, '');
   const contentJSON = await fetch(
     `${assetBaseUri}/${ASSET_SOURCE_ID}/content.json`
   ).then((res) => res.json());