diff --git a/browser/resources/browser_switch/app.ts b/browser/resources/browser_switch/app.ts
index c3784d2b6011ab02717b73a6c8a73c66c7b8913c..93240305872c3d30a7f5d2c423b25adfb4410268 100644
--- a/browser/resources/browser_switch/app.ts
+++ b/browser/resources/browser_switch/app.ts
@@ -145,7 +145,7 @@ function getUrlHostname(url: string): string {
   const anchor = document.createElement('a');
   anchor.href = url;
   // Return entire url if parsing failed (which means the URL is bogus).
-  return anchor.hostname || url;
+  return anchor.hostname || encodeURI(url);
 }
 
 function getProxy(): BrowserSwitchProxy {