diff --git a/src/app/pages/auth/ServerPicker.tsx b/src/app/pages/auth/ServerPicker.tsx
index e66d92a1d2..10dddb7d03 100644
--- a/src/app/pages/auth/ServerPicker.tsx
+++ b/src/app/pages/auth/ServerPicker.tsx
@@ -89,6 +89,8 @@ export function ServerPicker({
       size="500"
       readOnly={!allowCustomServer}
       onClick={allowCustomServer ? undefined : handleOpenServerMenu}
+      // disable auto-capitalization, which is usually undesirable for server name input.
+      autoCapitalize="off"
       after={
         serverList.length === 0 || (serverList.length === 1 && !allowCustomServer) ? undefined : (
           <PopOut
diff --git a/src/app/pages/auth/login/PasswordLoginForm.tsx b/src/app/pages/auth/login/PasswordLoginForm.tsx
index bbbb5f35db..74a55250a7 100644
--- a/src/app/pages/auth/login/PasswordLoginForm.tsx
+++ b/src/app/pages/auth/login/PasswordLoginForm.tsx
@@ -210,6 +210,8 @@ export function PasswordLoginForm({ defaultUsername, defaultEmail }: PasswordLog
           size="500"
           required
           outlined
+          // disable auto-capitalization, which is usually undesirable for username input.
+          autoCapitalize="off"
           after={<UsernameHint server={server} />}
         />
         {loginState.status === AsyncStatus.Error && (