HTML

disable-html-form-input-autocomplete-autofill

<form autocomplete="off">
  <input type="text" name="username" autocomplete="off" />
  <!--OR-->
  <input type="text" name="email" autocomplete="off" />
  
  <input type="password" name="password" autocomplete="new-password" />
</form>

disable form input autocomplete

<form autocomplete="off" method="post" action="">
    <input autocomplete="false" name="hidden" type="text" style="display:none;">
    ...

input disable autocomplete

autocomplete="off"