diff --git a/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.test.tsx b/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.test.tsx
index 91fb3d934f..36a62f1b8a 100644
--- a/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.test.tsx
+++ b/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.test.tsx
@@ -25,7 +25,7 @@ describe('base64EncodeContent', () => {
   it('encodes text files', () => {
     expect(base64EncodeContent('abc')).toBe('YWJj');
     expect(base64EncodeContent('abc'.repeat(1000000))).toBe(
-      Buffer.from('<file too large>').toString('base64'),
+      window.btoa('<file too large>'),
     );
   });
 
@@ -38,7 +38,7 @@ describe('base64EncodeContent', () => {
     );
     // Triggers size check
     expect(base64EncodeContent('😅'.repeat(1000000))).toBe(
-      Buffer.from('<file too large>').toString('base64'),
+      window.btoa('<file too large>'),
     );
   });
 });
diff --git a/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.tsx b/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.tsx
index 17e077e47c..3534b62c39 100644
--- a/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.tsx
+++ b/plugins/scaffolder/src/components/TemplateEditorPage/DryRunContext.tsx
@@ -59,11 +59,11 @@ interface DryRunProviderProps {
 
 export function base64EncodeContent(content: string): string {
   if (content.length > MAX_CONTENT_SIZE) {
-    return Buffer.from('<file too large>').toString('base64');
+    return window.btoa('<file too large>');
   }
 
   try {
-    return Buffer.from(content).toString('base64');
+    return window.btoa(content);
   } catch {
     const decoder = new TextEncoder();
     const buffer = decoder.encode(content);
@@ -74,7 +74,7 @@ export function base64EncodeContent(content: string): string {
         String.fromCharCode(...buffer.slice(offset, offset + CHUNK_SIZE)),
       );
     }
-    return Buffer.from(chunks.join('')).toString('base64');
+    return window.btoa(chunks.join(''));
   }
 }
 
diff --git a/plugins/scaffolder/src/components/TemplateEditorPage/DryRunResults/DryRunResultsView.test.tsx b/plugins/scaffolder/src/components/TemplateEditorPage/DryRunResults/DryRunResultsView.test.tsx
index 106ee0379f..c709adfd68 100644
--- a/plugins/scaffolder/src/components/TemplateEditorPage/DryRunResults/DryRunResultsView.test.tsx
+++ b/plugins/scaffolder/src/components/TemplateEditorPage/DryRunResults/DryRunResultsView.test.tsx
@@ -58,8 +58,7 @@ describe('DryRunResultsView', () => {
                 directoryContents: [
                   {
                     path: 'foo.txt',
-                    base64Content:
-                      Buffer.from('Foo Content').toString('base64'),
+                    base64Content: window.btoa('Foo Content'),
                     executable: false,
                   },
                 ],